Partially skip generating community modules when none enabled (qmk#25819)

Author: zvecr

builddefs/build_keyboard.mk

@@ -255,6 +255,8 @@ endif
 COMMUNITY_RULES_MK = $(shell $(QMK_BIN) generate-community-modules-rules-mk -kb $(KEYBOARD) --quiet --escape --output $(INTERMEDIATE_OUTPUT)/src/community_rules.mk $(KEYMAP_JSON))
 include $(COMMUNITY_RULES_MK)
 
+ifneq ($(COMMUNITY_MODULES),)
+
 $(INTERMEDIATE_OUTPUT)/src/community_modules.h: $(KEYMAP_JSON) $(DD_CONFIG_FILES)
 	@$(SILENT) || printf "$(MSG_GENERATING) $@" | $(AWK_CMD)
 	$(eval CMD=$(QMK_BIN) generate-community-modules-h -kb $(KEYBOARD) --quiet --output $(INTERMEDIATE_OUTPUT)/src/community_modules.h $(KEYMAP_JSON))
@@ -289,6 +291,8 @@ SRC += $(INTERMEDIATE_OUTPUT)/src/community_modules.c
 
 generated-files: $(INTERMEDIATE_OUTPUT)/src/community_modules.h $(INTERMEDIATE_OUTPUT)/src/community_modules.c $(INTERMEDIATE_OUTPUT)/src/community_modules_introspection.c $(INTERMEDIATE_OUTPUT)/src/community_modules_introspection.h $(INTERMEDIATE_OUTPUT)/src/led_matrix_community_modules.inc $(INTERMEDIATE_OUTPUT)/src/rgb_matrix_community_modules.inc
 
+endif
+
 include $(BUILDDEFS_PATH)/converters.mk
 
 # Generate the board's version.h file.