don't suppress mage -clean errors any more (#9854)

now that missing cache dirs don't cause an error

Makefile

@@ -77,7 +77,7 @@ clean:
 	@rm -rf build
 	@$(foreach var,$(PROJECTS) $(PROJECTS_XPACK_MAGE),$(MAKE) -C $(var) clean || exit 1;)
 	@$(MAKE) -C generator clean
-	@-mage -clean 2> /dev/null
+	@-mage -clean
 
 # Cleans up the vendor directory from unnecessary files
 # This should always be run after updating the dependencies

dev-tools/make/mage.mk

@@ -8,6 +8,6 @@ mage:
 ifndef MAGE_PRESENT
 	@echo Installing mage $(MAGE_VERSION) from vendor dir.
 	@go install -ldflags="-X $(MAGE_IMPORT_PATH)/mage.gitTag=$(MAGE_VERSION)" ${MAGE_IMPORT_PATH}
-	@-mage -clean 2> /dev/null || true
+	@-mage -clean
 endif
 	@true

libbeat/scripts/Makefile

@@ -160,7 +160,7 @@ clean:: ## @build  Cleans up all files generated by the build steps
 	@rm -f _meta/fields.generated.yml fields.yml
 	@rm -rf $(PWD)/_meta/kibana.generated
 	@rm -f ${BEAT_NAME}.template*.json
-	@-mage -clean 2> /dev/null || true
+	@-mage -clean
 
 .PHONY: ci
 ci:  ## @build Shortcut for continuous integration. This should always run before merging.