Remove code for built-in route conditions

Note that the :host option still requires special
handling because options can comflict with options.
Is it a code smell?

lib/sinatra/base.rb

@@ -729,8 +729,9 @@ def user_agent(pattern)
           end
         }
       end
+      alias_method :agent, :user_agent
 
-      def accept_mime_types(types)
+      def provides(*types)
         types = [types] unless types.kind_of? Array
         types.map!{|t| media_type(t)}
 
@@ -762,11 +763,11 @@ def delete(path, opts={}, &bk); route 'DELETE', path, opts, &bk end
       def head(path, opts={}, &bk);   route 'HEAD',   path, opts, &bk end
 
     private
-      def route(verb, path, opts={}, &block)
-        host_name  opts.delete(:host)  if opts.key?(:host)
-        user_agent opts.delete(:agent) if opts.key?(:agent)
-        accept_mime_types opts.delete(:provides) if opts.key?(:provides)
-        opts.each {|o, args| send(o, *args)}
+      def route(verb, path, options={}, &block)
+        options.each {|option, args| send(option, *args)}
+
+        # Because of self.options.host
+        host_name(options[:host]) if options.key?(:host)
 
         pattern, keys = compile(path)
         conditions, @conditions = @conditions, []