Unix CLI: Don't initially re-ask PIM if it was already specified (#1288)

We don't need to reset PIM in PasswordException as it is immediately
fell back to if PIM is specified in text mode, but password is not.
This causes an exception that resets the PIM when it shouldn't.

src/Main/TextUserInterface.cpp

@@ -1409,7 +1409,6 @@ namespace VeraCrypt
 			{
 				ShowInfo (e);
 				options.Password.reset();
-				options.Pim = -1;
 			}
 		}