Remove in-game CrazyGames banner ad (#4567)

## Summary

- Remove the bottom-left 300×250 CrazyGames banner ad shown during
gameplay (created when the spawn phase ends in `InGamePromo`), including
its cleanup path in `hideAd()`
- Remove the now-unused `createBottomLeftAd()` / `clearBottomLeftAd()`
wrappers and the `banner` portion of the CrazyGames SDK type declaration

On CrazyGames, `window.adsEnabled` is already forced to `false`
(Main.ts), so the Playwire in-game path can't activate there — with this
change the game screen shows no ads at all on the CrazyGames platform.
Midgame video interstitials (singleplayer start, game exit) are
unchanged.

## Test plan

- [x] `npx tsc --noEmit` passes
- [x] ESLint passes on touched files
- [ ] On CrazyGames: no banner appears bottom-left after spawn phase
ends

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

src/client/hud/layers/InGamePromo.ts

@@ -1,7 +1,6 @@
 import { LitElement, html } from "lit";
 import { customElement } from "lit/decorators.js";
 import { Controller } from "../../Controller";
-import { crazyGamesSDK } from "../../CrazyGamesSDK";
 import { GameView } from "../../view";
 
 const AD_TYPES = [
@@ -52,17 +51,9 @@ export class InGamePromo extends LitElement implements Controller {
   }
 
   private showAd(): void {
-    console.log(
-      `[InGamePromo] showAd called, isOnCrazyGames=${crazyGamesSDK.isOnCrazyGames()}`,
-    );
     if (window.innerWidth < 1100) return;
     if (window.innerHeight < 750) return;
 
-    if (crazyGamesSDK.isOnCrazyGames()) {
-      this.showCrazyGamesAd();
-      return;
-    }
-
     if (!window.adsEnabled) return;
 
     this.shouldShow = true;
@@ -74,25 +65,6 @@ export class InGamePromo extends LitElement implements Controller {
     });
   }
 
-  private showCrazyGamesAd(): void {
-    console.log(
-      `[InGamePromo] showCrazyGamesAd called, isReady=${crazyGamesSDK.isReady()}, width=${window.innerWidth}, height=${window.innerHeight}`,
-    );
-    if (!crazyGamesSDK.isReady()) {
-      console.log(
-        "[InGamePromo] CrazyGames SDK not ready, skipping in-game ad",
-      );
-      return;
-    }
-
-    this.requestUpdate();
-
-    this.updateComplete.then(() => {
-      console.log("[InGamePromo] DOM updated, calling createBottomLeftAd");
-      crazyGamesSDK.createBottomLeftAd();
-    });
-  }
-
   private checkForAds(): void {
     if (this.adCheckInterval) {
       clearInterval(this.adCheckInterval);
@@ -146,13 +118,6 @@ export class InGamePromo extends LitElement implements Controller {
     this.adsVisible = false;
     this.destroyBottomRail();
 
-    if (crazyGamesSDK.isOnCrazyGames()) {
-      crazyGamesSDK.clearBottomLeftAd();
-      this.shouldShow = false;
-      this.requestUpdate();
-      return;
-    }
-
     if (!window.ramp) {
       console.warn("Playwire RAMP not available for in-game ad");
       return;