Get rid of patches which were merged upstream

tutor/templates/build/openedx/Dockerfile

@@ -38,13 +38,6 @@ ENV VIRTUAL_ENV /openedx/venv/
 RUN pip install setuptools==39.0.1 pip==9.0.3
 RUN pip install -r requirements/edx/base.txt
 
-# Install patched version of ora2
-RUN pip uninstall -y ora2 && \
-    pip install git+https://github.com/overhangio/edx-ora2.git@2.2.0-patched#egg=ora2==2.2.0
-
-# Install patched version of edx-oauth2-provider
-RUN pip install git+https://github.com/overhangio/edx-oauth2-provider.git@1.2.3#egg=edx-oauth2-provider==1.2.3
-
 # Install a recent version of nodejs
 RUN nodeenv /openedx/nodeenv --node=8.9.3 --prebuilt
 ENV PATH /openedx/nodeenv/bin:${PATH}