Hide Create Page in Site Actions for Publishing Sites

Add Hide Custom Action tag in xml file below:

..\14\TEMPLATE\FEATURES\Publishing\SiteActionMenuCustomization.xml

<HideCustomAction
   Id="HideCreatePublishingPage"
   GroupId="SiteActions"
   HideActionId="PublishingSiteActionsMenuCustomizer"
   Location="Microsoft.SharePoint.StandardMenu">
</HideCustomAction>