Remove hybi sub directory for WebSocket layout tests

LayoutTests/http/tests/websocket/workers/resources/worker-handshake-challenge-randomness.js

 var challenge1;
 var challenge2;
 
 function endTest()
 {
     if (challenge1 === challenge2)
         postMessage('FAIL: worker: challenge1 === challenge2 (challenge was ' + challenge1 + ')');
     else
         postMessage('PASS: worker: challenge1 !== challenge2');
 
@@ skipping 28 matching lines @@
             }
         }
     } catch (e) {
         postMessage('FAIL: worker: Unexpected exception: ' + e);
     } finally {
         postMessage('PASS: worker: Parsed successfully.');
     }
 }
 
 runTests();