* removed duplicated unit usage

* better description for delphi support compiler flag

glBitmap.pas

@@ -221,7 +221,7 @@ unit glBitmap;
 
 // Please uncomment the defines below to configure the glBitmap to your preferences.
 // If you have configured the unit you can uncomment the warning above.
-{.$MESSAGE warn 'Hey. I''m the glBitmap.pas and i need to be configured. My master tell me your preferences! ;)'}
+{$MESSAGE error 'Hey. I''m the glBitmap.pas and i need to be configured. My master tell me your preferences! ;)'}
 
 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 // Preferences ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -238,7 +238,7 @@ unit glBitmap;
 // activate to enable the support for SDL_surfaces
 {.$DEFINE GLB_SDL}
 
-// activate  to enable the support for TBitmap from Delphi (not lazarus)
+// activate  to enable the support for Delphi (including support for Delphi's (not Lazarus') TBitmap)
 {.$DEFINE GLB_DELPHI}
 
 // activate to enable the support for TLazIntfImage from Lazarus
@@ -1236,7 +1236,6 @@ implementation
 
 uses
   Math, syncobjs, typinfo
-  {$IFDEF GLB_DELPHI}, Types{$ENDIF}
   {$IF DEFINED(GLB_SUPPORT_JPEG_READ) AND DEFINED(GLB_LAZ_JPEG)}, FPReadJPEG{$IFEND};
 
 type