b=778031 remove unnecessary ScopedXErrorHandler::GetError interface r=cjones

--HG--
extra : transplant_source : %FE%EC%0A%24%1B%8A%B3%D2%94%F6%2B%23%E3%A9R%8Df%90%FF%17

gfx/src/X11Util.cpp

@@ -78,12 +78,7 @@ bool
 ScopedXErrorHandler::SyncAndGetError(Display *dpy, XErrorEvent *ev)
 {
     FinishX(dpy);
-    return GetError(ev);
-}
 
-bool
-ScopedXErrorHandler::GetError(XErrorEvent *ev)
-{
     bool retval = mXError.mError.error_code != 0;
     if (ev)
         *ev = mXError.mError;

gfx/src/X11Util.h

@@ -137,13 +137,6 @@ public:
      *           the first one will be returned.
      */
     bool SyncAndGetError(Display *dpy, XErrorEvent *ev = nullptr);
-
-    /** Like SyncAndGetError, but does not sync. Faster, but only reliably catches errors in synchronous calls.
-     *
-     * \param ev this optional parameter, if set, will be filled with the XErrorEvent object. If multiple errors occurred,
-     *           the first one will be returned.
-     */
-    bool GetError(XErrorEvent *ev = nullptr);
 };
 
 } // namespace mozilla