Remove the x86-64-unknown-linux-builder (#112)

It has been replaced by standard-builder.

Author: SeanTAllen

.github/workflows/pr.yml

@@ -49,14 +49,6 @@ jobs:
       - name: Docker build
         run: "docker build --pull --file=release-a-library/Dockerfile ."
 
-  validate-x86-64-unknown-linux-builder-image-builds:
-    name: Validate x86-64-unknown-linux-builder Docker image builds
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4.1.1
-      - name: Docker build
-        run: "docker build --pull --file=x86-64-unknown-linux-builder/Dockerfile ."
-
   validate-x86-64-unknown-linux-builder-with-libressl-3_9_2-image-builds:
     name: Validate x86-64-unknown-linux-builder-with-libressl-3.9.2 Docker image builds
     runs-on: ubuntu-latest

x86-64-unknown-linux-builder-with-libressl-3.9.2/build-and-push.bash

@@ -14,14 +14,14 @@ DOCKERFILE_DIR="$(dirname "$0")"
 
 NAME="ghcr.io/ponylang/shared-docker-ci-x86-64-unknown-linux-builder-with-libressl-3.9.2"
 
-# built from x86-64-unknown-linux-builder release tag
+# built from standard-builder release tag
 FROM_TAG=release
 TAG_AS=release
 docker build --pull --build-arg FROM_TAG="${FROM_TAG}" \
   -t "${NAME}:${TAG_AS}" "${DOCKERFILE_DIR}"
 docker push "${NAME}:${TAG_AS}"
 
-# built from standard-linux-builder nightly tag
+# built from standard-builder nightly tag
 FROM_TAG=nightly
 TAG_AS=latest
 docker build --pull --build-arg FROM_TAG="${FROM_TAG}" \

x86-64-unknown-linux-builder-with-openssl_1.1.1w/build-and-push.bash

@@ -14,7 +14,7 @@ DOCKERFILE_DIR="$(dirname "$0")"
 
 NAME="ghcr.io/ponylang/shared-docker-ci-x86-64-unknown-linux-builder-with-openssl_1.1.1w"
 
-# built from x86-64-unknown-linux-builder release tag
+# built from standard-builder release tag
 FROM_TAG=release
 TAG_AS=release
 docker build --pull --build-arg FROM_TAG="${FROM_TAG}" \

x86-64-unknown-linux-builder-with-openssl_3.4.1/build-and-push.bash

@@ -13,7 +13,7 @@ DOCKERFILE_DIR="$(dirname "$0")"
 
 NAME="ghcr.io/ponylang/shared-docker-ci-x86-64-unknown-linux-builder-with-openssl_3.4.1"
 
-# built from x86-64-unknown-linux-builder release tag
+# built from standard-builder release tag
 FROM_TAG=release
 TAG_AS=release
 docker build --pull --build-arg FROM_TAG="${FROM_TAG}" \