Revert "allow select to have multiple arguments"

This reverts commit 04cc446.

I reverted it because apparently we want to use: select([:a, :b])
instead of select(:a, :b), but there was no tests for that form.

activerecord/lib/active_record/relation/query_methods.rb

@@ -37,15 +37,12 @@ def preload(*args)
       relation
     end
 
-    def select(*args, &blk)
-      if !block_given? && args.blank?
-        raise ArgumentError
-      end
+    def select(value = Proc.new)
       if block_given?
-        to_a.select {|*block_args| blk.call(*block_args) }
+        to_a.select {|*block_args| value.call(*block_args) }
       else
         relation = clone
-        relation.select_values += args
+        relation.select_values += Array.wrap(value)
         relation
       end
     end

activerecord/test/cases/base_test.rb

@@ -123,11 +123,6 @@ def test_select_symbol
     assert_equal Topic.all.map(&:id).sort, topic_ids
   end
 
-  def test_select_symbol_for_many_arguments
-    topics = Topic.select(:id, :author_name).map{|topic| [topic.id, topic.author_name]}.sort
-    assert_equal Topic.all.map{|topic| [topic.id,topic.author_name]}.sort, topics
-  end
-
   def test_table_exists
     assert !NonExistentTable.table_exists?
     assert Topic.table_exists?