0032696: Coding - get rid of unused forward declarations [StepSelect to Xw]

Packages starting with lower-case (gp and gce) are also processed.

src/ViewerTest/ViewerTest_CmdParser.hxx

@@ -24,8 +24,6 @@
 #include <set>
 #include <string>
 
-class Quantity_Color;
-class Quantity_ColorRGBA;
 class gp_Vec;
 class gp_Pnt;
 

src/ViewerTest/ViewerTest_ContinuousRedrawer.hxx

@@ -19,7 +19,6 @@
 #include <Standard_Mutex.hxx>
 #include <Standard_Type.hxx>
 
-class Aspect_Window;
 class V3d_View;
 
 //! Auxiliary tool performing continuous redraws of specified window.