btrfs-progs: remove stale dir-test

It does not 't build anymore and we don't have any use for it.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>

Makefile

@@ -495,10 +495,6 @@ btrfs-convert.static: $(static_convert_objects) $(static_objects) $(static_libbt
 	@echo "    [LD]     $@"
 	$(Q)$(CC) -o $@ $^ $(STATIC_LDFLAGS) $(btrfs_convert_libs) $(STATIC_LIBS)
 
-dir-test: dir-test.o $(objects) $(libs)
-	@echo "    [LD]     $@"
-	$(Q)$(CC) -o $@ $^ $(LDFLAGS) $(LIBS)
-
 quick-test: quick-test.o $(objects) $(libs)
 	@echo "    [LD]     $@"
 	$(Q)$(CC) -o $@ $^ $(LDFLAGS) $(LIBS)
@@ -603,7 +599,7 @@ clean: $(CLEANDIRS)
 		image/*.o image/*.o.d \
 		convert/*.o convert/*.o.d \
 		mkfs/*.o mkfs/*.o.d check/*.o check/*.o.d \
-	      dir-test ioctl-test quick-test library-test library-test-static \
+	      ioctl-test quick-test library-test library-test-static \
               mktables btrfs.static mkfs.btrfs.static fssum \
 	      $(check_defs) \
 	      $(libs) $(lib_links) \