refactor(ci): delete unused quick-lint-js-github-builder Docker image

The ghcr.io/quick-lint/quick-lint-js-github-builder Docker image is no
longer used. However, its Dockerfile exists and there are references to
it in some comments.

Clean up references to ghcr.io/quick-lint/quick-lint-js-github-builder
because we don't want to use it anymore.

.github/docker/README.md

@@ -5,7 +5,5 @@ Actions workflows.
 
 ## Images
 
-* `quick-lint-js-github-builder`: creates
-  `ghcr.io/quick-lint/quick-lint-js-github-builder`
 * `quick-lint-js-github-cross-builder`: creates
   `ghcr.io/quick-lint/quick-lint-js-github-cross-builder`

.github/workflows/build-and-test-dev-env-nix.yml

@@ -11,7 +11,7 @@ jobs:
   build:
     name: build and test dev env nix
     runs-on: ubuntu-latest
-    # TODO(strager): Use ghcr.io/quick-lint/quick-lint-js-github-builder.
+    # TODO(strager): Use a stable Docker image.
     steps:
       - name: checkout
         uses: actions/checkout@v3

.github/workflows/build-and-test-plugin-vscode.yml

@@ -91,8 +91,8 @@ jobs:
         os:
           - {runs_on: macos-12, name: "macOS x86_64", platform_arch: "darwin-x64"}
           - {runs_on: stracle-macos-aarch64, name: "macOS AArch64", platform_arch: "darwin-arm64"}
-          # FIXME(strager): For some reason, tests fail with the
-          # ghcr.io/quick-lint/quick-lint-js-github-builder Docker container.
+          # FIXME(strager): For some reason, tests fail with the a Docker
+          # container.
           - {runs_on: ubuntu-latest, name: "Linux x86_64", platform_arch: "linux-x64", xvfb: true}
           - {runs_on: windows-2022, name: "Windows x86", platform_arch: "win32-ia32"}
           - {runs_on: windows-2022, name: "Windows x64", platform_arch: "win32-x64"}
@@ -155,7 +155,7 @@ jobs:
     name: VS Code .vsix
     needs: build
     runs-on: ubuntu-latest
-    # TODO(strager): Use ghcr.io/quick-lint/quick-lint-js-github-builder.
+    # TODO(strager): Use a stable Docker image.
     env:
       QLJS_COLLECT_COPYRIGHT_NO_WARNINGS: 1
     steps:

.github/workflows/test-nix-install.yml

@@ -11,7 +11,7 @@ jobs:
   build-nix:
     name: test Nix install
     runs-on: ubuntu-latest
-    # TODO(strager): Use ghcr.io/quick-lint/quick-lint-js-github-builder.
+    # TODO(strager): Use a stable Docker image.
     steps:
       - name: checkout
         uses: actions/checkout@v3