Bug 1653214 - Part 2: Remove nsIBaseWindow::Create; r=nika

Differential Revision: https://phabricator.services.mozilla.com/D83767

docshell/base/nsDocShell.cpp

@@ -4111,13 +4111,6 @@ nsDocShell::InitWindow(nativeWindow aParentNativeWindow,
   return NS_OK;
 }
 
-NS_IMETHODIMP
-nsDocShell::Create() {
-  // Implementations have been moved to nsDocShell::Initialize
-  MOZ_DIAGNOSTIC_ASSERT(false);
-  return NS_ERROR_NULL_POINTER;
-}
-
 NS_IMETHODIMP
 nsDocShell::Destroy() {
   // XXX: We allow this function to be called just once.  If you are going to