unnecessary condition

truth table
pContext   bDummyContext  !pContext || bDummyContext    pContext && !bDummyContext
T             T                     T                             F
T             F                     F                             T
F             T                     T                             F
F             F                     T                             F

Change-Id: I52e4647cb081eae265b3cc31e60a1ac6b0a5337d
Reviewed-on: https://gerrit.libreoffice.org/41418Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>

vcl/source/filter/graphicfilter.cxx

@@ -1554,8 +1554,7 @@ ErrCode GraphicFilter::ImportGraphic( Graphic& rGraphic, const OUString& rPath,
     }
     else
     {
-        if( pContext && !bDummyContext )
-            aFilterName = pContext->GetUpperFilterName();
+        aFilterName = pContext->GetUpperFilterName();
 
         nStreamBegin = 0;
         nStatus = ERRCODE_NONE;