Removed unused component argument with typo

no issue

- spotted the typo and thought there was a bug somewhere but post count isn't used in the complete-with-email-error state of the publish flow

ghost/admin/app/components/editor-labs/modals/publish-flow.hbs

@@ -26,7 +26,6 @@
             <EditorLabs::Modals::PublishFlow::CompleteWithEmailError
                 @emailErrorMessage={{this.emailErrorMessage}}
                 @publishOptions={{@data.publishOptions}}
-                @posCount={{this.posCount}}
                 @close={{@close}}
             />
         {{else if this.isConfirming}}