Remove unnecessary code from Makefile.

[Rajat-Dabade]

There are some pieces of code which was added for debugging purposes.

For example

info: ## Display build information
	@echo "Build Number: $(BUILD_NUMBER)"
	@echo "Build Date: $(BUILD_DATE)"
	@echo "Build Hash: $(BUILD_HASH)"
	@echo "Plugin ID: $(PLUGIN_ID)"
	@echo "Plugin Version: $(PLUGIN_VERSION)"
	@echo "Bundle Name: $(BUNDLE_NAME)"

Should be removed once the plugin is stable.