Remove accidentally added .gerrit_commit_message file.
Remove accidentally added .gerrit_commit_message file.

Change-Id: I86a424696677a9e336477614b717c9652aa011c5

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref