Remove user precice

We assume that this user has already been created in the base image.

tools/releasing/packaging/docker/Dockerfile

@@ -16,16 +16,6 @@ RUN apt-get -qq update && apt-get -qq install \
     pkg-config && \
     rm -rf /var/lib/apt/lists/*
 
-## Needed, because precice/precice:latest does not create a user? See also https://github.com/precice/precice/pull/1090, https://github.com/precice/python-bindings/issues/191
-## ------>
-# Create user precice
-ARG uid=1000
-ARG gid=1000
-RUN groupadd -g ${gid} precice \
-    && useradd -u ${uid} -g ${gid} -m -s /bin/bash precice \
-    && sudo usermod -a -G sudo precice
-## <-----
-
 # Setup passwordless sudo
 RUN echo "ALL            ALL = (ALL) NOPASSWD: ALL" >> /etc/sudoers