apt-get remove removed

dockerfiles/odoo/Dockerfile

@@ -31,14 +31,6 @@ RUN pip install num2words
 RUN pip install psycogreen
 RUN pip install pysftp
 
-# Remove unused packages
-RUN set -x; \
-        apt-get remove \
-        gcc \
-        python-dev \
-        libffi-dev \
-    && apt-get auto-remove
-
 # Install Odoo
 ENV ODOO_VERSION 8.0
 ENV ODOO_RELEASE 20160329