opengl dr.memory: Avoid double delete.
opengl dr.memory: Avoid double delete.

The context is deleted via OpenGLSalGraphicsImpl::~OpenGLSalGraphicsImpl later,
doing it already here leads to a double delete and a crash.

Change-Id: Icf1bed81501b5ac67ef60901eaa73e5ee5540a9f

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core