fix: remove pollOnceForOurDisplayName test

saved work in a branch but we need to use workers in unit tests before its work testing

ts/test/session/unit/swarm_polling/SwarmPolling_test.ts

@@ -448,11 +448,4 @@ describe('SwarmPolling', () => {
       });
     });
   });
-
-  describe('pollOnceForOurDisplayName', () => {
-    // Arrange
-    // TODO[epic=ses-1560] needs doing
-    // Act
-    // Assert
-  });
 });