Assume all filesystems support reflinks

This is a hack that lets me make reflinks on NFS mounts using NFS v4.2
server-side copy support.

lib/utilities.c

@@ -751,21 +751,8 @@ static RmMountEntry *rm_mount_list_next(RmMountEntries *self) {
     }
 }
 
-static bool fs_supports_reflinks(char *fstype, char *mountpoint) {
-    if(strcmp(fstype, "btrfs") == 0) {
-        return true;
-    }
-    if(strcmp(fstype, "ocfs2") == 0) {
-        return true;
-    }
-    if(strcmp(fstype, "xfs") == 0) {
-        /* xfs *might* support reflinks...*/
-        char *cmd = g_strdup_printf("xfs_info '%s' | grep -q 'reflink=1'", mountpoint);
-        int res = system(cmd);
-        g_free(cmd);
-        return (res == 0);
-    }
-    return false;
+static bool fs_supports_reflinks(_UNUSED char *fstype, _UNUSED char *mountpoint) {
+    return true;
 }
 
 static RmMountEntries *rm_mount_list_open(RmMountTable *table) {