remove GUI support in Dockerfile

QT5 may cause hard to interpret import errors on older Linux kernels:
https://bbs.archlinux.org/viewtopic.php?id=232682

docker/Dockerfile

@@ -25,10 +25,7 @@ RUN apt-get update -y && apt-get install -y cmake \
                                             libeigen3-dev \
                                             libboost-all-dev \
                                             libpng-dev \
-                                            qt5-qmake \
-                                            qtbase5-dev \
                                             python3-all \
-                                            python3-pyqt5 \
                                             python3-numpy \
                                             python3-scipy \
                                             python3-pandas \
@@ -83,7 +80,8 @@ RUN cd ${SRC_FOLDER} && \
              -DOPEN_MM_INCLUDE_DIR=$OPENMM_INCLUDE_PATH \
              -DOPEN_MM_PLUGIN_DIR=$OPENMM_LIB_PATH/plugins \
              -DENABLE_GFX=ON \
-             -DENABLE_GUI=ON \
+             -DENABLE_GUI=OFF \
+             -DENABLE_INFO=OFF \
              -DCMAKE_C_FLAGS="-isystem /usr/include/boost/ -isystem ${OPENMM_INCLUDE_PATH}/include" \
              -DCMAKE_CXX_FLAGS="-isystem /usr/include/boost/ -isystem ${OPENMM_INCLUDE_PATH}/include" && \
     make -j ${CPUS_FOR_MAKE} && \
@@ -100,7 +98,6 @@ WORKDIR /home
 ENV OST_ROOT="/usr/local"
 ENV PYTHONPATH="/usr/local/lib64/python3.8/site-packages"
 ENV LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/local/lib64:/usr/local/openmm/lib/"
-ENV QT_X11_NO_MITSHM=1
 ENV OPENSTRUCTURE_VERSION=$OPENSTRUCTURE_VERSION
 
 ENTRYPOINT ["ost"]

docker/README.rst

@@ -164,17 +164,6 @@ To see the help for compare-structures action run:
   cd <PATH TO OST>/docker
   ./run_docker_ost <IMAGE NAME> compare-structures
 
-Run GUI
--------
-
-The container is built with GUI support, but this is still to be considered an
-experimental feature as it is known to depend on some properties of the host
-where Docker is run. What works on some Linux machines is the following:
-
-.. code-block:: bash
-
-  xhost +local:docker
-  docker run -ti --rm -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix --entrypoint dng <IMAGE NAME>
 
 Running other commands
 ----------------------