There is no need to disable Python packages for Python versions that are no longer in Nixpkgs.
This change was generated using the following script:

pattern='^\s*disabled\s*=\s*pythonOlder\s*"3.\([0-9]\|10\)"\s*;\s*$'
for f in $(find -name '*.nix'); do
    grep -q "$pattern" "$f" || continue
    sed -i "/$pattern/d" "$f"
    if [ $(grep -c pythonOlder "$f") == 1 ]; then
        sed -i '/^\s*pythonOlder,\s*$/d' "$f"
    fi
    nixfmt "$f"
done

Any suggestions for how to deal with two consecutive blank lines caused by the script?
EDIT: running nixfmt is enough

Things done

• Built on platform:
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• Tested, as applicable:
  • NixOS tests in nixos/tests.
  • Package tests at passthru.tests.
  • Tests in lib/tests or pkgs/test for functions and "core" functionality.
• Ran nixpkgs-review on this PR. See nixpkgs-review usage.
• Tested basic functionality of all binary files, usually in ./result/bin/.
• Nixpkgs Release Notes
  • Package update: when the change is major or breaking.
• NixOS Release Notes
  • Module addition: when adding a new NixOS module.
  • Module update: when the change is significant.
• Fits CONTRIBUTING.md, pkgs/README.md, maintainers/README.md and other READMEs.

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