DEV: Always run backwards-compat logic

There was a ~1 week period where the modifier existed in core, but only applied to the new topic list.

Running the modifyClass unconditionally takes care of that. We'll be removing it once the raw-hbs topic list is removed in the next few months.

javascripts/discourse/initializers/init-topic-excerpts.js

@@ -2,17 +2,12 @@ import { apiInitializer } from "discourse/lib/api";
 import { withSilencedDeprecations } from "discourse-common/lib/deprecated";
 
 export default apiInitializer("0.8", (api) => {
-  const transformerExists = api.registerValueTransformer(
-    "topic-list-item-expand-pinned",
-    () => true
-  );
+  api.registerValueTransformer("topic-list-item-expand-pinned", () => true);
 
-  if (!transformerExists) {
-    withSilencedDeprecations("discourse.hbr-topic-list-overrides", () => {
-      api.modifyClass("component:topic-list-item", {
-        pluginId: "discourse-air",
-        expandPinned: true,
-      });
+  withSilencedDeprecations("discourse.hbr-topic-list-overrides", () => {
+    api.modifyClass("component:topic-list-item", {
+      pluginId: "discourse-air",
+      expandPinned: true,
     });
-  }
+  });
 });