Remove CentOS from CI (#686)

* use vaulted centos packages

* removed centos 7 from ci

.github/workflows/ci.yml

@@ -184,23 +184,6 @@ jobs:
  - name: Test
  run: cabal test -fpure-haskell --ghc-options=-fno-ignore-asserts --enable-tests --test-show-details=direct all
 
- old-gcc:
- needs: build
- runs-on: ubuntu-latest
- container:
- image: centos:7
- steps:
- - name: install deps
- run: |
- yum install -y gcc gmp gmp-devel make ncurses ncurses-compat-libs xz perl
- curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | BOOTSTRAP_HASKELL_NONINTERACTIVE=1 BOOTSTRAP_HASKELL_GHC_VERSION=9.2.8 sh
- - uses: actions/checkout@v3 #This version must stay old enough to remain compatible with the container image
- - name: test
- run: |
- source ~/.ghcup/env
- cabal update
- cabal run bytestring-tests
-
  i386:
  needs: build
  runs-on: ubuntu-latest