Do not install libtiff on Alpine

.github/workflows/build.yml

@@ -3,10 +3,6 @@ name: Docker images
 
 on: [push, pull_request, workflow_dispatch]
 
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
 jobs:
   build:
     name: ${{ matrix.target }} + ${{ matrix.image }}
@@ -17,38 +13,7 @@ jobs:
         target:
           - "latest"
         image:
-          # Run slower jobs first to give them a headstart and reduce waiting time
-          - "ubuntu-22.04-jammy-arm64v8"
-          - "ubuntu-22.04-jammy-ppc64le"
-          - "ubuntu-22.04-jammy-s390x"
-          # test image for manylinux-wheel build
-          - "ubuntu-22.04-jammy-amd64"
-          # Then run the remainder
           - "alpine"
-          - "amazon-2-amd64"
-          - "arch"
-          - "centos-7-amd64"
-          - "centos-stream-8-amd64"
-          - "centos-stream-9-amd64"
-          - "debian-10-buster-x86"
-          - "debian-11-bullseye-x86"
-          - "fedora-36-amd64"
-          - "fedora-37-amd64"
-          - "gentoo"
-          - "ubuntu-18.04-bionic-amd64"
-          - "ubuntu-20.04-focal-amd64"
-          - "ubuntu-22.04-jammy-amd64-valgrind"
-          # has a dependency on the test image
-          - "manylinux2014-wheel-build"
-        include:
-          - image: "manylinux2014-wheel-build"
-            test-image: "ubuntu-22.04-jammy-amd64"
-          - image: "ubuntu-22.04-jammy-arm64v8"
-            qemu-arch: "aarch64"
-          - image: "ubuntu-22.04-jammy-ppc64le"
-            qemu-arch: "ppc64le"
-          - image: "ubuntu-22.04-jammy-s390x"
-            qemu-arch: "s390x"
 
     steps:
       - uses: actions/checkout@v3

alpine/Dockerfile

@@ -25,11 +25,9 @@ RUN apk --no-cache add \
     fribidi-dev \
     harfbuzz-dev \
     jpeg-dev \
-    lcms2-dev \
     libimagequant-dev \
     openjpeg-dev \
     tcl-dev \
-    tiff-dev \
     tk-dev \
     zlib-dev