btrfs-progs: tests: clean up the test driver of convert tests

Everything is now in separate tests, and TEST=mask now works.

Signed-off-by: David Sterba <dsterba@suse.com>

tests/convert-tests.sh

@@ -21,9 +21,6 @@ export LANG
 
 rm -f $RESULTS
 
-setup_root_helper
-prepare_test_dev 512M
-
 run_one_test() {
 	local testname
 
@@ -43,15 +40,6 @@ run_one_test() {
 	fi
 }
 
-if ! [ -z "$TEST" ]; then
-	echo "    [TEST/conv]   skipped all convert tests, TEST=$TEST"
-	exit 0
-fi
-
-for feature in '' 'extref' 'skinny-metadata' 'no-holes'; do
-	:
-done
-
 # Test special images
 for i in $(find $TOP/tests/convert-tests -maxdepth 1 -mindepth 1 -type d \
 	   ${TEST:+-name "$TEST"} | sort)