runtime: Remove redundant subcommands from go-test.sh

go-test.sh accepts subcommands, however invoking it in the usual way via
the Makefile doesn't use them.  In fact the only remaining subcommand is
"help" and we already have another way of getting the usage information
(-h or --help).  We don't need a second way, so just drop subcommand
handling.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

src/runtime/go-test.sh

@@ -42,8 +42,7 @@ usage()
 {
 	cat <<EOF
 
-Usage: $script_name help
-       $script_name [options] [cmd]
+Usage: $script_name [options]
 
 Options:
 
@@ -68,14 +67,6 @@ EOF
 
 		printf "    --%-10.10s # %s\n" "$option" "$description"
 	done
-
-	cat <<EOF
-
-Commands:
-
-    help           # Show usage.
-
-EOF
 }
 
 # Run a command as either root or the current user (which might still be root).
@@ -176,11 +167,6 @@ main()
 		shift
 	done
 
-	# Consume getopt cruft
-	[ "$1" = "--" ] && shift
-
-	[ "$1" = "help" ] && usage && exit 0
-
 	run_coverage=no
 	if [ "$CI" = true ] || [ -n "$KATA_DEV_MODE" ]; then
 		run_coverage=yes