Revert "disable caching of virtual devices when OpenGL is enabled"

Not needed anymore as the bug in OpenGL is fixed..

This reverts commit 6eff03b7d8.

drawinglayer/source/processor2d/vclhelperbufferdevice.cxx

@@ -27,7 +27,6 @@
 #include <vcl/lazydelete.hxx>
 #include <vcl/dibtools.hxx>
 
-#include <vcl/opengl/OpenGLWrapper.hxx>
 
 // buffered VDev usage
 
@@ -189,12 +188,7 @@ namespace
         maFreeBuffers.push_back(&rDevice);
         SAL_WARN_IF(maFreeBuffers.size() > 1000, "drawinglayer", "excessive cached buffers, "
             << maFreeBuffers.size() << " entries!");
-
-        if (OpenGLWrapper::isVCLOpenGLEnabled())
-            Invoke();
-        else
-            Start();
-
+        Start();
     }
 
     void VDevBuffer::Invoke()