Git: Remove double warning for gerrit push

Change-Id: I5581521753fa525c6bb9f53725c28f947c8bbd44
Reviewed-by: Petar Perisin <petar.perisin@gmail.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/git/logchangedialog.h

@@ -56,6 +56,7 @@ public:
               bool includeRemote = true);
     QString commit() const;
     int commitIndex() const;
+    QString earliestCommit() const;
 
 signals:
     void doubleClicked(const QString &commit);