Milo Refactor: Remove theme support

milo/appengine/settings/testBundle.go

Index: milo/appengine/settings/testBundle.go
diff --git a/milo/appengine/settings/testable_handler.go b/milo/appengine/settings/testBundle.go
similarity index 65%
rename from milo/appengine/settings/testable_handler.go
rename to milo/appengine/settings/testBundle.go
index e7b517a19564231029154420a6d1cde099a435b7..c68b80af7e60d61895c83a5231a0a0275623d79b 100644
--- a/milo/appengine/settings/testable_handler.go
+++ b/milo/appengine/settings/testBundle.go
@@ -10,14 +10,6 @@ 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.