Remove unused goog.provide statements (bazelbuild#651)

Author: gkdn

closure/testing/library/stacktrace.js

@@ -10,8 +10,6 @@
 
 goog.setTestOnly('goog.testing.stacktrace');
 goog.provide('goog.testing.stacktrace');
-goog.provide('goog.testing.stacktrace.Frame');
-
 
 
 /**

closure/testing/library/testcase.js

@@ -16,10 +16,6 @@
 
 goog.setTestOnly('goog.testing.TestCase');
 goog.provide('goog.testing.TestCase');
-goog.provide('goog.testing.TestCase.Error');
-goog.provide('goog.testing.TestCase.Order');
-goog.provide('goog.testing.TestCase.Result');
-goog.provide('goog.testing.TestCase.Test');
 goog.require('goog.testing.JsUnitException');
 goog.require('goog.testing.pending');