Remove CI and testing for GHCJS 8.6 (haskell-servant#1746)

This old version is expensive to maintain and the project
has stopped development in favour of GHC's own JS backend.

.github/workflows/master.yml

@@ -90,48 +90,3 @@ jobs:
           ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
           dist-newstyle
         key: ${{ runner.os }}-ghc-${{ matrix.ghc }}-cabal-${{ hashFiles('./.plan.json') }}
-
-  ghcjs:
-    name: ubuntu-latest / ghcjs 8.6
-    runs-on: "ubuntu-latest"
-
-    steps:
-    - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v20
-      with:
-        extra_nix_config: |
-          trusted-public-keys = ryantrinkle.com-1:JJiAKaRv9mWgpVAz8dwewnZe0AzzEAzPkagE9SP5NWI=1aba6f367982bd6dd78ec2fda75ab246a62d32c5 cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
-          substituters = https://nixcache.reflex-frp.org https://cache.nixos.org/
-        nix_path: nixpkgs=channel:release-22.11
-
-    - name: Setup
-      run: |
-        # Override cabal.project with the lightweight GHCJS one
-        cp cabal.ghcjs.project cabal.project
-        cat cabal.project
-        nix-shell ghcjs.nix --run "cabal v2-update && cabal v2-freeze"
-    - name: Cache
-      uses: actions/cache@v4
-      with:
-        path: |
-          ~/.cabal/store
-          dist-newstyle
-        key: ${{ runner.os }}-ghcjs8.6-cabal-${{ hashFiles('./.plan.json') }}
-        restore-keys: ${{ runner.os }}-ghc-${{ matrix.ghc }}-
-
-    - name: Build
-      run: |
-        nix-shell ghcjs.nix --run "cabal v2-build --ghcjs --enable-tests --enable-benchmarks all"
-
-    - name: Tests
-      run: |
-        nix-shell ghcjs.nix --run ".github/run-ghcjs-tests.sh"
-
-    - name: Save cache
-      uses: actions/cache/save@v4
-      if: always()
-      with:
-        path: |
-          ~/.cabal/store
-          dist-newstyle
-        key: ${{ runner.os }}-ghcjs8.6-${{ hashFiles('cabal.project.freeze') }}

servant-client-core/servant-client-core.cabal

@@ -17,7 +17,6 @@ maintainer:          [email protected]
 copyright:           2014-2016 Zalora South East Asia Pte Ltd, 2016-2019 Servant Contributors
 build-type:          Simple
 tested-with: GHC ==8.10.7, GHC ==9.0.2, GHC ==9.2.8, GHC ==9.4.8, GHC ==9.6.4, GHC ==9.8.2
-           , GHCJS ==8.6.0.1
 
 extra-source-files:
   CHANGELOG.md

servant-client/servant-client.cabal

@@ -21,7 +21,6 @@ maintainer:          [email protected]
 copyright:           2014-2016 Zalora South East Asia Pte Ltd, 2016-2019 Servant Contributors
 build-type:          Simple
 tested-with: GHC ==8.10.7, GHC ==9.0.2, GHC ==9.2.8, GHC ==9.4.8, GHC ==9.6.4, GHC ==9.8.2
-           , GHCJS ==8.6.0.1
 
 extra-source-files:
   CHANGELOG.md

servant/servant.cabal

@@ -20,7 +20,6 @@ maintainer:          [email protected]
 copyright:           2014-2016 Zalora South East Asia Pte Ltd, 2016-2019 Servant Contributors
 build-type:          Simple
 tested-with: GHC ==8.10.7, GHC ==9.0.2, GHC ==9.2.8, GHC ==9.4.8, GHC ==9.6.4, GHC ==9.8.2
-           , GHCJS ==8.6.0.1
 
 extra-source-files:
   CHANGELOG.md