RPMs for Centos 5/6/7

Since the original introduction of the rpm/build_rpms.bsh script in
commit 4a71627 of PR git-lfs#332 it has
checked for the absence of the "go" binary and, if it is not found,
installs the golang package, except on CentOS 5 where fetches and
patches a golang.spec file and then builds a local RPM using that
in order to install Go.

However, in commit b560b85 of PR git-lfs#1298 and
in commit git-lfs/build-dockers@64a3a9f of
PR git-lfs/build-dockers#3 we dropped support for CentOS 5.

And in commit 88430de of PR git-lfs#654 we
updated our CentOS Dockerfiles (before they were moved to the
git-lfs/build-dockers repository) to download and install Go from the
googleapis.com service, and we still continue to do this but as of
commit git-lfs/build-dockers@c638503
in PR git-lfs/build-dockers#35 we now use the golang.org service.

This direct download obviates the logic in our rpm/build_rpms.bsh
script to install the golang package, and the special handling for
CentOS 5 is also obsolete, so we remove this logic from our script.

Since the original introduction of support for building CentOS RPMs
in commit git-lfs/git-lfs@4a71627 of
PR git-lfs/git-lfs#332, an rpm/clean.bsh script has been provided
to perform the equivalent of a "git clean -xdf" command on the
Git repository from which we build Git LFS.

However, this script is no longer needed as all of the CentOS and
Rocky Linux container image builds have a native Git package installed,
so we can drop this script from the git-lfs/git-lfs repository and
also drop our use of it here.

Since the original introduction of support for building CentOS RPMs
in commit git-lfs/git-lfs@4a71627 of
PR git-lfs/git-lfs#332, an rpm/clean.bsh script has been provided
to perform the equivalent of a "git clean -xdf" command on the
Git repository from which we build Git LFS.

However, this script is no longer needed as all of the CentOS and
Rocky Linux container image builds have a native Git package installed,
so we can drop this script from the git-lfs/git-lfs repository and
also drop our use of it here.

Since the original introduction of the rpm/build_rpms.bsh script in
commit 4a71627 of PR git-lfs#332 it has
checked for the absence of the "go" binary and, if it is not found,
installs the golang package, except on CentOS 5 where fetches and
patches a golang.spec file and then builds a local RPM using that
in order to install Go.

However, in commit b560b85 of PR git-lfs#1298 and
in commit git-lfs/build-dockers@64a3a9f of
PR git-lfs/build-dockers#3 we dropped support for CentOS 5.

And in commit 88430de of PR git-lfs#654 we
updated our CentOS Dockerfiles (before they were moved to the
git-lfs/build-dockers repository) to download and install Go from the
googleapis.com service, and we still continue to do this but as of
commit git-lfs/build-dockers@c638503
in PR git-lfs/build-dockers#35 we now use the golang.org service.

This direct download obviates the logic in our rpm/build_rpms.bsh
script to install the golang package, and the special handling for
CentOS 5 is also obsolete, so we remove this logic from our script.

Since the original introduction of the rpm/build_rpms.bsh script in
commit 4a71627 of PR git-lfs#332 it has
installed a number of packages, including make, curl, tar, and bison.

Then in commit a4c9db8 of PR git-lfs#480 the
perl-Digest-SHA package was added as an install target as well.

However, we no longer need to install any of these, either because the
are already installed by our CentOS and Rocky Linux Dockerfiles in
our git-lfs/build-dockers project, or because they are simply unused
at present, so we remove these packages now.

Our rpm/build_rpms.bsh script currently attempts to parse the
/etc/os-release file to retrieve the major OS version number, and
if that file does not exist, reads /etc/redhat-release instead;
the latter logic has been in place since the introduction of the
script in commit 4a71627 of
PR git-lfs#332, and has been the fallback logic since commit
56ffe42 of PR git-lfs#555.

However, /etc/os-release should exist on all the current versions
of CentOS and Rocky Linux we support, so we do not need to retain
the fallback parsing of /etc/redhat-release at this point.

Since the original introduction of the rpm/build_rpms.bsh script in
commit 4a71627 of PR git-lfs#332 it has
checked for the absence of the "go" binary and, if it is not found,
installs the golang package, except on CentOS 5 where fetches and
patches a golang.spec file and then builds a local RPM using that
in order to install Go.

However, in commit b560b85 of PR git-lfs#1298 and
in commit git-lfs/build-dockers@64a3a9f of
PR git-lfs/build-dockers#3 we dropped support for CentOS 5.

And in commit 88430de of PR git-lfs#654 we
updated our CentOS Dockerfiles (before they were moved to the
git-lfs/build-dockers repository) to download and install Go from the
googleapis.com service, and we still continue to do this but as of
commit git-lfs/build-dockers@c638503
in PR git-lfs/build-dockers#35 we now use the golang.org service.

This direct download obviates the logic in our rpm/build_rpms.bsh
script to install the golang package, and the special handling for
CentOS 5 is also obsolete, so we remove this logic from our script.

Since the original introduction of the rpm/build_rpms.bsh script in
commit 4a71627 of PR git-lfs#332 it has
installed a number of packages, including make, curl, tar, and bison.

Then in commit a4c9db8 of PR git-lfs#480 the
perl-Digest-SHA package was added as an install target as well.

However, we no longer need to install any of these, either because the
are already installed by our CentOS and Rocky Linux Dockerfiles in
our git-lfs/build-dockers project, or because they are simply unused
at present, so we remove these packages now.

Since the original introduction of the rpm/build_rpms.bsh script in
commit 4a71627 of PR git-lfs#332 it has
installed a number of packages, including make, curl, tar, and bison.

Then in commit a4c9db8 of PR git-lfs#480 the
perl-Digest-SHA package was added as an install target as well.

However, we no longer need to install any of these, either because the
are already installed by our CentOS and Rocky Linux Dockerfiles in
our git-lfs/build-dockers project, or because they are simply unused
at present, so we remove these packages now.

Since the original introduction of support for building CentOS RPMs
in commit git-lfs/git-lfs@4a71627
of PR git-lfs/git-lfs#332, an rpm/clean.bsh script has been provided
to perform the equivalent of a "git clean -xdf" command on the
Git repository from which we build Git LFS.

However, this script is no longer needed as all of the CentOS and
Rocky Linux container image builds have a native Git package installed,
so we remove our use of it, and also drop the script from the primary
Git LFS project in PR git-lfs/git-lfs#5241.

Since the original introduction of support for building CentOS RPMs
in commit git-lfs/git-lfs@4a71627
of PR git-lfs/git-lfs#332, an rpm/clean.bsh script has been provided
to perform the equivalent of a "git clean -xdf" command on the
Git repository from which we build Git LFS.

However, this script is no longer needed as all of the CentOS and
Rocky Linux container image builds have a native Git package installed,
so we remove our use of it, and also drop the script from the primary
Git LFS project in PR git-lfs/git-lfs#5241.

Since the original introduction of support for building CentOS RPMs
in commit 4a71627 of PR git-lfs#332, an
rpm/clean.bsh script has been provided to perform the equivalent of
a "git clean -xdf" command on the Git repository from which we build
Git LFS.

However, this script is no longer needed as all of the CentOS and
Rocky Linux container image builds have a native Git package installed,
and so we remove the only use of it, in the centos_script.bsh script
of the git-lfs/build-dockers project, in commit
git-lfs/build-dockers@7be51a4 of
PR git-lfs/build-dockers#54, and can therefore also drop the
script from this repository as well.