Revert "Fix GRAILS-10763 problem with comments inside UrlMappings configuration"

This reverts commit c9611154af1c5dd7d5141a9e582200c1cd0a122a.

Conflicts:
	grails-plugin-url-mappings/src/main/groovy/org/codehaus/groovy/grails/plugins/web/mapping/UrlMappingsGrailsPlugin.groovy
	grails-test-suite-uber/src/test/groovy/org/codehaus/groovy/grails/plugins/web/mapping/UrlMappingsGrailsPluginTests.groovy