redundant assertions.

Reviewed by Anders Carlsson.

* Plugins/Hosted/NetscapePluginHostProxy.mm:
(WebKit::NetscapePluginHostProxy::deadNameNotificationCallback):
* Plugins/Hosted/WebHostedNetscapePluginView.mm:
(-[WebHostedNetscapePluginView setAttributeKeys:andValues:]):
(-[WebHostedNetscapePluginView _webPluginContainerCancelCheckIfAllowedToLoadRequest:]):
* Plugins/WebBaseNetscapePluginView.mm:
(-[WebBaseNetscapePluginView halt]):
(-[WebBaseNetscapePluginView resumeFromHalt]):
* Plugins/WebNetscapePluginView.mm:
(-[WebNetscapePluginView saveAndSetNewPortStateForUpdate:]):
(-[WebNetscapePluginView _webPluginContainerCancelCheckIfAllowedToLoadRequest:]):
* WebCoreSupport/WebContextMenuClient.mm:
(WebContextMenuClient::getCustomMenuFromDefaultItems):
* WebCoreSupport/WebEditorClient.mm:
(WebEditorClient::checkGrammarOfString):
(WebEditorClient::checkTextOfParagraph):
* WebView/WebTextCompletionController.mm:
(-[WebTextCompletionController _reflectSelection]):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@49806 268f45cc-cd09-0410-ab3c-d52691b4dbfc