merge revision(s) 48102: [Backport #10413]

	* class.c (unknown_keyword_error): delete expected keywords
	  directly from raw table, so that the given block is not called.
	  [ruby-core:65837] [Bug #10413]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@48284 b2dd03c8-39d4-4d8f-98ff-823fe69b080e