Remove gr dependencies

Dockerfile

@@ -12,8 +12,6 @@ WORKDIR /usr/src/app
 COPY Gemfile Gemfile.lock ./
 
 RUN \
-  echo 'deb http://download.opensuse.org/repositories/science:/gr-framework/Debian_11/ /' | tee /etc/apt/sources.list.d/science:gr-framework.list && \
-  curl -fsSL https://download.opensuse.org/repositories/science:gr-framework/Debian_11/Release.key | gpg --dearmor | tee /etc/apt/trusted.gpg.d/science_gr-framework.gpg > /dev/null && \
   apt-get update -qq && \
   apt-get install -y $BUILD_PACKAGES && \
   bundle install