fix: remove invalid WeakSet.clear() call from resetRegistration() (#530)

WeakSet does not have a .clear() method in JavaScript.
The previous call would throw a TypeError at runtime.

This is intentional because:
1. WeakSet entries are garbage-collected automatically when the
   referenced object is no longer reachable.
2. Module hot-reload triggers a fresh module state, creating a new
   _registeredApis WeakSet automatically.
3. The existing comment already documented the design intent.

Author: jlin53882

index.ts

@@ -4139,7 +4139,7 @@ export function resetRegistration() {
   // Note: WeakSets cannot be cleared by design. In test scenarios where the
   // same process reloads the module, a fresh module state means a new WeakSet.
   // For hot-reload scenarios, the module is re-imported fresh.
-  _registeredApis.clear();
+  // (WeakSet.clear() does not exist, so we do nothing here.)
 }
 
 export default memoryLanceDBProPlugin;