Remove tests for unused IDL compiler features

Source/bindings/tests/idls/TestObject.idl

Index: Source/bindings/tests/idls/TestObject.idl
diff --git a/Source/bindings/tests/idls/TestObject.idl b/Source/bindings/tests/idls/TestObject.idl
index a8a303db2c5fdf45ed938a8d75a208c68953e2ae..628570260c91deada3511b552cd40248948b3e27 100644
--- a/Source/bindings/tests/idls/TestObject.idl
+++ b/Source/bindings/tests/idls/TestObject.idl
@@ -40,10 +40,10 @@ callback TestCallbackFunction = void (TestEnumType formal1, TestObject formal2);
     // Attributes
     readonly attribute long            readOnlyLongAttr;
     readonly attribute DOMString       readOnlyStringAttr;
-    readonly attribute TestObject         readOnlyTestObjectAttr;
+    readonly attribute TestObject      readOnlyTestObjectAttr;
     static readonly attribute long     staticReadOnlyLongAttr;
     static attribute DOMString         staticStringAttr;
-    static readonly attribute TestSubObjConstructor TestSubObj;
+    attribute TestSubObjConstructor    TestSubObj;
     attribute TestEnumType             enumAttr;
     readonly attribute TestEnumType    readOnlyEnumAttr;
     attribute byte                     byteAttr;