staging: dgap: remove unused case value in dgap_parsefile()

If rc is zero, this function will returns with an error and
cannot reach switch-case statement.
Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgap/dgap.c

@@ -6357,10 +6357,6 @@ static int dgap_parsefile(char **in)
 		}
 
 		switch (rc) {
-		case 0:
-			dgap_err("unexpected end of file");
-			return -1;
-
 		case BEGIN:	/* should only be 1 begin */
 			dgap_err("unexpected config_begin\n");
 			return -1;