Remove the Compare with Latest Repository version action for Git

The action makes little sense for Git cause the repository is local and almost always behind the remote.
See for reference IDEA-93769

plugins/git4idea/src/META-INF/plugin.xml

@@ -46,7 +46,6 @@
       <reference ref="Annotate"/>
       <reference ref="Show.Current.Revision"/>
       <reference ref="Compare.SameVersion"/>
-      <reference ref="Compare.LastVersion"/>
       <reference ref="Compare.Selected"/>
       <action id="Git.CompareWithBranch" class="git4idea.actions.GitCompareWithBranchAction" text="Compare with Branch..." />
       <reference ref="Vcs.ShowTabbedFileHistory"/>