Remove gitlab config (#4037)

* revert #2345

* remove gitlab yml

.appveyor.yml

@@ -11,7 +11,6 @@ skip_commits:
     - .clang-format
     - .*ignore
     - .codacy.yml
-    - .gitlab-ci.yml
     - .travis.yml
     - '**/*.md'
     - Dockerfile

.gitlab-ci.yml

@@ -1,139 +0,0 @@
----
-stages:
-  - build
-
-.artifacts: &artifacts
-  artifacts:
-    paths:
-      - build/
-
-.cache: &cache
-  cache:
-    key: "$CI_BUILD_NAME"
-    paths:
-      - cache/
-
-.branches: &branches
-  only:
-    - master
-
-.tags: &tags
-  tags:
-    - linux
-    - docker
-
-
-#================================ DEBIAN-BASED ================================
-
-.build_rc_package_deb: &build_rc_package_deb
-  stage: build
-  script:
-    - mkdir -p build
-    - cd build
-    - cmake .. -DWITH_SERVER=1 -DCMAKE_BUILD_TYPE=Release -DCPACK_GENERATOR=DEB
-    - make package -j2
-
-.build_debug_package_deb: &build_debug_package_deb
-  stage: build
-  script:
-    - mkdir -p build
-    - cd build
-    - cmake .. -DWITH_SERVER=1 -DCMAKE_BUILD_TYPE=Debug -DCPACK_GENERATOR=DEB
-    - make package -j2
-
-.deb-artifacts: &artifacts_deb
-  artifacts:
-    paths:
-      - build/*.deb
-      - build/CMakeFiles/*.log
-    when: always
-
-#----------------------------------- UBUNTU -----------------------------------
-
-.requirements_16xx: &install_requirements_16xx
-  before_script:
-    - apt-get -o dir::cache::archives="cache" update -qq
-    - apt-get -o dir::cache::archives="cache" install -y build-essential g++ cmake git
-    - apt-get -o dir::cache::archives="cache" install -y libprotobuf-dev protobuf-compiler
-    - apt-get -o dir::cache::archives="cache" install -y qt5-default qttools5-dev qttools5-dev-tools
-    - apt-get -o dir::cache::archives="cache" install -y qtmultimedia5-dev libqt5multimedia5-plugins
-    - apt-get -o dir::cache::archives="cache" install -y libqt5svg5-dev libqt5sql5-mysql
-    - apt-get -o dir::cache::archives="cache" install -y libqt5websockets5-dev
-
-.requirements_17xx: &install_requirements_17xx
-  before_script:
-    - apt-get -o dir::cache::archives="cache" update -qq
-    - apt-get -o dir::cache::archives="cache" install -y build-essential g++ cmake git
-    - apt-get -o dir::cache::archives="cache" install -y libprotobuf-dev protobuf-compiler
-    - apt-get -o dir::cache::archives="cache" install -y qt5-default qttools5-dev qttools5-dev-tools
-    - apt-get -o dir::cache::archives="cache" install -y qtmultimedia5-dev libqt5multimedia5-plugins
-    - apt-get -o dir::cache::archives="cache" install -y libqt5svg5-dev libqt5sql5-mysql
-    - apt-get -o dir::cache::archives="cache" install -y libqt5websockets5-dev
-
-.build_1604: &1604
-  image: ubuntu:16.04
-  <<: *tags
-  <<: *branches
-  <<: *install_requirements_16xx
-  <<: *artifacts_deb
-  <<: *cache
-
-.build_1710: &1710
-  image: ubuntu:17.10
-  <<: *tags
-  <<: *branches
-  <<: *install_requirements_17xx
-  <<: *artifacts_deb
-  <<: *cache
-
-build_rc_1604:
-  <<: *1604
-  <<: *build_rc_package_deb
-  when: always
-
-build_debug_1604:
-  <<: *1604
-  <<: *build_debug_package_deb
-  when: always
-
-build_rc_1710:
-  <<: *1710
-  <<: *build_rc_package_deb
-  when: always
-
-build_debug_1710:
-  <<: *1710
-  <<: *build_debug_package_deb
-  when: always
-  allow_failure: true
-
-#----------------------------------- DEBIAN -----------------------------------
-
-.requirements_stretch: &install_requirements_stretch
-  before_script:
-    - apt-get -o dir::cache::archives="cache" update -qq
-    - apt-get -o dir::cache::archives="cache" install -y build-essential g++ cmake git
-    - apt-get -o dir::cache::archives="cache" install -y qt5-default qtbase5-dev-tools
-    - apt-get -o dir::cache::archives="cache" install -y qttools5-dev-tools qtmultimedia5-dev
-    - apt-get -o dir::cache::archives="cache" install -y libqt5svg5-dev libqt5websockets5-dev
-    - apt-get -o dir::cache::archives="cache" install -y libprotobuf-dev protobuf-compiler
-
-.build_stretch: &stretch
-  image: debian:stretch
-  <<: *tags
-  <<: *branches
-  <<: *install_requirements_stretch
-  <<: *artifacts_deb
-  <<: *cache
-
-build_rc_stretch:
-  <<: *stretch
-  <<: *build_rc_package_deb
-  when: always
-
-build_debug_stretch:
-  <<: *stretch
-  <<: *build_debug_package_deb
-  when: always
-  allow_failure: true
-