Revert "Fix V8 crashes with plugins. The extra call to _NPN_ReleaseObject inside forgetV8ObjectForNPObject is causing a double deletion."

Right problem, wrong fix.

This reverts commit 9e0d526d0170e26b1dc2d0da8347cca28b5f3507.
diff --git a/WebCore/bindings/v8/V8NPObject.cpp b/WebCore/bindings/v8/V8NPObject.cpp
index bace84d..b873d5f 100644
--- a/WebCore/bindings/v8/V8NPObject.cpp
+++ b/WebCore/bindings/v8/V8NPObject.cpp
@@ -396,5 +396,6 @@
         v8::Persistent<v8::Object> handle(staticNPObjectMap.get(object));
         V8DOMWrapper::setDOMWrapper(handle, WebCore::V8ClassIndex::NPOBJECT, 0);
         staticNPObjectMap.forget(object);
+        _NPN_ReleaseObject(object);
     }
 }