Milo Refactor: Remove theme support

milo/appengine/common/testBundle.go

 // Copyright 2016 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 // Data Structures used for defining test data for use with testing each theme.
 
-package settings
+package common
 
 import (
         "github.com/luci/luci-go/server/templates"
 )
 
-// TestableHandler pairs up a handler with a list of test data.
-type TestableHandler interface {
-        // ThemedHandler represents the Hanler that this TestableHandler is associated with.
-        ThemedHandler
-        // TestData returns a list of example data used for testing if a theme renders correctly.
-        TestData() []TestBundle
-}
-
 // TestBundle is a template arg associated with a description used for testing.
 type TestBundle struct {
         // Description is a short one line description of what the data contains.
         Description string
         // Data is the data fed directly into the template.
         Data templates.Args
 }