Revert "Add proper decRef, virtualize destructor and mute native window base debugging"

Causing errors with using eglCreateImageKHR so reverting for now.

This reverts commit 37b113723be8cf1e7175209fde1d11365f0d493b.
egl: remove offscreen rendering code
egl: move to newer native window API

Signed-off-by: Simon Busch <morphis@gravedo.de>