removed CI again

.gitlab-ci.yml

@@ -1,25 +0,0 @@
-image: conanio/clang7
-
-stages:
-  - build
-
-job A:
-  stage: build
-  before_script:
-    - sudo pip install --upgrade conan
-    - conan user
-    - conan profile new default --detect
-    - conan profile update settings.compiler=clang default
-    - conan profile update settings.compiler.version=7.0 default
-    - conan profile update settings.compiler.libcxx=libstdc++11 default
-    - conan profile update env.CC=/usr/bin/clang default
-    - conan profile update env.CXX=/usr/bin/clang++ default
-  script:
-    - mkdir build && cd build
-    - conan install .. --build missing
-    - cmake -DCMAKE_CXX_COMPILER=clang++ .. -G Ninja
-    - cmake --build .
-  cache:
-    key: libraries
-    paths:
-      - ~/.conan/