fix: drop duplicate SteamUtils import surfaced by upstream rebase

Upstream's 45c9f0d (allow Steam intent launches when disconnected) added an
import that also exists on the SDK cloud bridge commit; the rebase replayed
both and Kotlin rejects ambiguous imports.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: TideGear

app/src/main/java/app/gamenative/ui/PluviaMain.kt

@@ -97,7 +97,6 @@ import app.gamenative.utils.CustomGameScanner
 import app.gamenative.utils.ManifestInstaller
 import app.gamenative.utils.GameFeedbackUtils
 import app.gamenative.utils.IntentLaunchManager
-import app.gamenative.utils.SteamUtils
 import app.gamenative.utils.UpdateChecker
 import app.gamenative.utils.UpdateInfo
 import app.gamenative.utils.UpdateInstaller