Remove dependency of html/pdf on tags (#2376)

The dependency on ..-norm-tags.json means it would have to run asciidoctor to build the tags JSON first (which is quite slow), but it isn't actually required.

Author: Timmmm

Makefile

@@ -157,19 +157,19 @@ NORM_TAG_FILE_ARGS := $(foreach relative_pname,$(DOCS_NORM_TAGS),-t /$(relative_
 # Add -d to each normative rule definition filename
 NORM_RULE_DEF_ARGS := $(foreach relative_pname,$(NORM_RULE_DEF_FILES),-d $(relative_pname))
 
-$(BUILD_DIR)/%.pdf: $(SRC_DIR)/%.adoc $(ALL_SRCS) $(BUILD_DIR)/%-norm-tags.json
+$(BUILD_DIR)/%.pdf: $(SRC_DIR)/%.adoc $(ALL_SRCS)
 	$(WORKDIR_SETUP)
 	$(DOCKER_CMD) $(DOCKER_QUOTE) $(ASCIIDOCTOR_PDF) $(OPTIONS) $(REQUIRES) $< $(DOCKER_QUOTE)
 	$(WORKDIR_TEARDOWN)
 	@echo -e '\n  Built \e]8;;file://$(abspath $@)\e\\$@\e]8;;\e\\\n'
 
-$(BUILD_DIR)/%.html: $(SRC_DIR)/%.adoc $(ALL_SRCS) $(BUILD_DIR)/%-norm-tags.json
+$(BUILD_DIR)/%.html: $(SRC_DIR)/%.adoc $(ALL_SRCS)
 	$(WORKDIR_SETUP)
 	$(DOCKER_CMD) $(DOCKER_QUOTE) $(ASCIIDOCTOR_HTML) $(OPTIONS) $(REQUIRES) $< $(DOCKER_QUOTE)
 	$(WORKDIR_TEARDOWN)
 	@echo -e '\n  Built \e]8;;file://$(abspath $@)\e\\$@\e]8;;\e\\\n'
 
-$(BUILD_DIR)/%.epub: $(SRC_DIR)/%.adoc $(ALL_SRCS) $(BUILD_DIR)/%-norm-tags.json
+$(BUILD_DIR)/%.epub: $(SRC_DIR)/%.adoc $(ALL_SRCS)
 	$(WORKDIR_SETUP)
 	$(DOCKER_CMD) $(DOCKER_QUOTE) $(ASCIIDOCTOR_EPUB) $(OPTIONS) $(REQUIRES) $< $(DOCKER_QUOTE)
 	$(WORKDIR_TEARDOWN)