tests: prefer require_inotify_supported_ to file system check

* tests/tail/inotify-rotate-resources.sh: Use require_inotify_supported_
instead of require_local_dir_ and the recently added check for
overlayfs.
Suggested by Pádraig Brady.

tests/tail/inotify-rotate-resources.sh

@@ -19,13 +19,7 @@
 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
 print_ver_ tail
 
-# Inotify not used on remote file systems
-require_local_dir_
-
-# We don't use inotify on overlayfs.
-# See the comments in human_fstype from src/stat.c.
-test "$(stat -f -c "%T" .)" != overlayfs \
-  || skip_ 'inotify is not used on overlayfs'
+require_inotify_supported_
 
 grep '^#define HAVE_INOTIFY 1' "$CONFIG_HEADER" >/dev/null \
   || skip_ 'inotify required'