[ci] disable arch

refs https://github.com/dune-community/Dockerfiles/pull/19

.travis.yml

@@ -64,8 +64,6 @@ jobs:
     env: DOCKER_TAG=debian_gcc_full
   - stage: test_cpp
     env: DOCKER_TAG=debian_clang_full
-  - stage: test_cpp
-    env: DOCKER_TAG=arch_gcc_full
   - stage: test_python
     env: DOCKER_TAG=debian_gcc_full
     script: ${DOCKER_RUN} /root/src/dune-xt-common/.travis.test_python.bash
@@ -76,11 +74,6 @@ jobs:
     script: ${DOCKER_RUN} /root/src/dune-xt-common/.travis.test_python.bash
     # overwrite other global/matrix settings
     after_script: true
-  - stage: test_python
-    env: DOCKER_TAG=arch_gcc_full
-    script: ${DOCKER_RUN} /root/src/dune-xt-common/.travis.test_python.bash
-    # overwrite other global/matrix settings
-    after_script: true
-
+   
 #   THIS FILE IS AUTOGENERATED -- DO NOT EDIT  #
-#  Re-run .ci/templates/update.py --nd instead #
\ No newline at end of file
+#  Re-run .ci/templates/update.py --nd instead #