Removing unnecessary code that seems to be the root of macOS 10.15 crash

Removed redundant code that causes a crash (regression) on macOS 10.15, the issue is related to applications that use Layer-hosting for rendering purposes. The removed code seems to be doing what is/should have already been done during initialization and causes a crash when trying to reset the context's view (which for Layer-hosting macOS applications seems rather odd) during Rendering.