CentOS 7 is EOL

CentOS 7 reached EOL of even maintinance updates on 2024-06-30.

.github/workflows/build.yml

@@ -37,42 +37,6 @@ jobs:
       #          TEST_PREFIX: valgrind --error-exitcode=99 --track-origins=yes --leak-check=full
       #        run: $GITHUB_WORKSPACE/test.sh
 
-  centos7:
-    name: CentOS 7
-    runs-on: ubuntu-latest
-    container: centos:7
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: Install dependencies
-        run: |
-          yum -y install http://rpms.remirepo.net/enterprise/remi-release-7.rpm
-          yum -y --enablerepo=remi install redis
-          yum -y install gcc gcc-c++ make openssl openssl-devel cmake3 valgrind libevent-devel
-
-      - name: Build using cmake
-        env:
-          EXTRA_CMAKE_OPTS: -DENABLE_EXAMPLES:BOOL=ON -DENABLE_SSL:BOOL=ON -DENABLE_SSL_TESTS:BOOL=ON -DENABLE_ASYNC_TESTS:BOOL=ON
-          CFLAGS: -Werror
-          CXXFLAGS: -Werror
-        run: mkdir build && cd build && cmake3 .. && make
-
-      - name: Build using Makefile
-        run: USE_SSL=1 TEST_ASYNC=1 make
-
-      - name: Run tests
-        env:
-          SKIPS_AS_FAILS: 1
-          TEST_SSL: 1
-        run: $GITHUB_WORKSPACE/test.sh
-
-      - name: Run tests under valgrind
-        env:
-          SKIPS_AS_FAILS: 1
-          TEST_SSL: 1
-          TEST_PREFIX: valgrind --error-exitcode=99 --track-origins=yes --leak-check=full
-        run: $GITHUB_WORKSPACE/test.sh
-
   centos8:
     name: RockyLinux 8
     runs-on: ubuntu-latest