Removed the following unreferenced packages:

system.appcontext/4.1.0
system.collections.concurrent/4.0.12
system.collections/4.0.11
system.diagnostics.debug/4.0.11
system.diagnostics.tracing/4.1.0
system.globalization/4.0.11
system.io.filesystem.primitives/4.0.1
system.io.filesystem/4.0.1
system.io/4.1.0
system.linq.expressions/4.1.0
system.linq/4.1.0
system.objectmodel/4.0.12
system.reflection.emit.ilgeneration/4.0.1
system.reflection.emit.lightweight/4.0.1
system.reflection.emit/4.0.1
system.reflection.extensions/4.0.1
system.reflection.primitives/4.0.1
system.reflection.typeextensions/4.1.0
system.reflection/4.1.0
system.resources.resourcemanager/4.0.1
system.runtime.extensions/4.1.0
system.runtime.handles/4.0.1
system.runtime.interopservices.runtimeinformation/4.0.0
system.runtime.interopservices/4.1.0
system.runtime/4.1.0
system.text.encoding.extensions/4.0.11
system.text.encoding/4.0.11
system.threading.tasks/4.0.11
system.threading/4.0.11