test: remove needless module

This is no longer a default gem. So our test names never conflicted
with others.

Author: kou

test/test_base64.rb

@@ -2,12 +2,10 @@
 require 'test/unit'
 require 'xmlrpc/base64'
 
-module TestXMLRPC
-  class Test_Base64 < Test::Unit::TestCase
-    def test_equals
-      refute_equal(XMLRPC::Base64.new('foobar'), 'foobar')
-      refute_equal(XMLRPC::Base64.new('foo'), XMLRPC::Base64.new('bar'))
-      assert_equal(XMLRPC::Base64.new('foobar'), XMLRPC::Base64.new('foobar'))
-    end
+class Test_Base64 < Test::Unit::TestCase
+  def test_equals
+    refute_equal(XMLRPC::Base64.new('foobar'), 'foobar')
+    refute_equal(XMLRPC::Base64.new('foo'), XMLRPC::Base64.new('bar'))
+    assert_equal(XMLRPC::Base64.new('foobar'), XMLRPC::Base64.new('foobar'))
   end
 end