Fix: Attempting to discard staged file would trigger destructive-action warning.
Fix: Attempting to discard staged file would trigger destructive-action warning.

Instead, it should do nothing at all (you can't discard a staged file).

Closes #165.

stoivo/GitSavvy,asfaltboy/GitSavvy,ddevlin/GitSavvy,asfaltboy/GitSavvy,jmanuel1/GitSavvy,divmain/GitSavvy,ddevlin/GitSavvy,stoivo/GitSavvy,divmain/GitSavvy,divmain/GitSavvy,ddevlin/GitSavvy,stoivo/GitSavvy,jmanuel1/GitSavvy,asfaltboy/GitSavvy