Milo Refactor: Remove theme support

milo/appengine/console/html_data.go

Index: milo/appengine/console/html_data.go
diff --git a/milo/appengine/console/html_data.go b/milo/appengine/console/html_data.go
index 97cb0d6d0bc15508f11f90210da4b149bd0b7295..b1f0186d1748b332164f947ddff7b8f3e9aeef9c 100644
--- a/milo/appengine/console/html_data.go
+++ b/milo/appengine/console/html_data.go
@@ -6,11 +6,7 @@ package console
 
 import "github.com/luci/luci-go/milo/appengine/settings"
 
-// TestableConsole is a subclass of Build that interfaces with TestableHandler and
-// includes sample test data.
-type TestableConsole struct{ Console }
-
-// TestData returns sample test data.
-func (x Console) TestData() (result []settings.TestBundle) {
+// ConsoleTestData returns sample console data.
+func ConsoleTestData() (result []settings.TestBundle) {
 	return
 }