Fix a couple of CallViewModel tests.

src/state/ObservableScope.ts

@@ -74,22 +74,14 @@ export class ObservableScope {
     // they will no longer re-emit their current value upon subscription. We want
     // to support Observables that complete (for example `of({})`), so we have to
     // take care to not propagate the completion event.
-    setValue$
-      .pipe(
-        this.bind(),
-        distinctUntilChanged((a, b) => {
-          logger.log("distinctUntilChanged", a, b);
-          return a === b;
-        }),
-      )
-      .subscribe({
-        next(value) {
-          subject$.next(value);
-        },
-        error(err: unknown) {
-          subject$.error(err);
-        },
-      });
+    setValue$.pipe(this.bind(), distinctUntilChanged()).subscribe({
+      next(value) {
+        subject$.next(value);
+      },
+      error(err: unknown) {
+        subject$.error(err);
+      },
+    });
     if (subject$.value === nothing)
       throw new Error("Behavior failed to synchronously emit an initial value");
     return subject$ as Behavior<T>;