Revert "Code model: Update on changes from the versioning system."

This reverts commit 7aa2411693.
It breaks the code model updates completely. So reverting this change
until we have the right thing.

Reviewed-by: Roberto Raggi

src/plugins/git/gitversioncontrol.cpp

@@ -96,10 +96,5 @@ QString GitVersionControl::findTopLevelForDirectory(const QString &directory) co
     return GitClient::findRepositoryForDirectory(directory);
 }
 
-void GitVersionControl::emitFilesChanged(const QStringList &l)
-{
-    emit filesChanged(l);
-}
-
 } // Internal
 } // Git