remove dockerhub build code

.github/workflows/build-and-push-images.yml

@@ -9,7 +9,6 @@ jobs:
     strategy:
       matrix:
         include:
-          - { postgres: 9,  alpine: '3.6'  }
           - { postgres: 10, alpine: '3.8'  }
           - { postgres: 11, alpine: '3.10' }
           - { postgres: 12, alpine: '3.12' }

hooks/build

@@ -1,12 +0,0 @@
-#!/bin/bash
-set -eux
-
-source ./hooks/versions.sh
-
-for pg_version in ${!VERSIONS[@]}; do
-  docker build \
-         --build-arg "ALPINE_VERSION=${VERSIONS[$pg_version]}" \
-         --tag "postgres-backup-s3:$pg_version" \
-         .
-done
-

hooks/push

@@ -1,9 +0,0 @@
-#!/bin/bash
-set -eux
-
-source ./hooks/versions.sh
-
-for pg_version in ${!VERSIONS[@]}; do
-  docker tag postgres-backup-s3:$pg_version $DOCKER_REPO:$pg_version
-  docker push $DOCKER_REPO:$pg_version
-done

hooks/versions.sh

@@ -1,7 +0,0 @@
-declare -A versions
-# VERSIONS[<postgres>]=<alpine>
-VERSIONS[10]=3.8
-VERSIONS[11]=3.10
-VERSIONS[12]=3.12
-VERSIONS[13]=3.14
-VERSIONS[14]=3.15