* common.mk (rdoc): independent.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27206 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

common.mk

@@ -350,7 +350,7 @@ do-install-doc: $(PROGRAM)
 post-install-doc::
 	@$(NULLCMD)
 
-rdoc: main PHONY
+rdoc: PHONY
 	@echo Generating RDoc documentation
 	$(XRUBY) "$(srcdir)/bin/rdoc" --no-force-update --all --ri --op "$(RDOCOUT)" $(RDOCFLAGS) "$(srcdir)"
 nodoc: PHONY