Remove hybi sub directory for WebSocket layout tests

LayoutTests/http/tests/websocket/workers/resources/receive-arraybuffer.js

 function createArrayBufferContainingHelloWorld()
 {
     var hello = "Hello, world!";
     var array = new Uint8Array(hello.length);
     for (var i = 0; i < hello.length; ++i)
         array[i] = hello.charCodeAt(i);
     return array.buffer;
 }
 
 function createEmptyArrayBuffer()
@@ skipping 56 matching lines @@
         postMessage("FAIL: actualArray.length should be " + expectedArray.length + " but was " + actualArray.length);
     // Print only the first mismatched byte in order not to flood console.
     for (var i = 0; i < expectedArray.length; ++i) {
         if (actualArray[i] != expectedArray[i]) {
             postMessage("FAIL: Value mismatch: actualArray[" + i + "] = " + actualArray[i] + ", expectedArray[" + i + "] = " + expectedArray[i]);
             return;
         }
     }
     postMessage("PASS: Passed: Message #" + testIndex + ".");
 }