refactor(provider-limrun): drop the Limrun iOS gesture denial the facts already make

The iOS direct session refused every gesture tier through
`limrunGestureFacts` (`iosGestureUnavailable` on live sessions, the liveness cell
otherwise), and `bindGestureOperations` binds a tier only when its cell is available —
so the interactor's throwing `performGesture` could never run. The member is already
optional on `Interactor`, and the binder already escalates an advertised tier with no
executor to `invalidRuntimeContract` rather than a refusal (ADR 0019 §2), a path pinned
by `gesture-runtime.test.ts`. What remained was unreachable code pretending to be an
implementation; the fact cell is now the single source of the agent-facing wording.

Author: thymikee

packages/provider-limrun/src/interaction-operations.ts

@@ -44,9 +44,9 @@ import { setTimeout as sleep } from 'node:timers/promises';
 
 const available = Object.freeze({ available: true } as const);
 /**
- * Limrun's iOS direct session drives text and touch but exposes no portable gesture execution —
- * its interactor's own `performGesture` refuses with this wording. Stating it as a fact refuses at
- * admission instead of mid-execution (ADR 0019 §6), keeping the agent-facing hint identical.
+ * Limrun's iOS direct session drives text and touch but exposes no portable gesture execution.
+ * Stating it as a fact refuses at admission instead of mid-execution (ADR 0019 §6), and it is
+ * the only refusal the caller sees: the leg's interactor carries no gesture member at all.
  */
 const iosGestureUnavailable = Object.freeze({
   available: false,

packages/provider-limrun/src/ios.ts

@@ -332,13 +332,6 @@ class LimrunIosInteractor implements Interactor {
     await this.session.client.setOrientation(orientation === 'portrait' ? 'Portrait' : 'Landscape');
   }
 
-  async performGesture(): Promise<never> {
-    throw unsupported(
-      'gesture',
-      'Limrun iOS direct sessions do not expose portable gesture execution yet.',
-    );
-  }
-
   async setSetting(): Promise<never> {
     throw unsupported('settings', 'Limrun iOS direct sessions do not expose settings changes yet.');
   }