Remove everything related to GCP setup.

This is not very relevant anymore, and is getting in my way of a full `git clean
-dfx && ./bazel build //...` workflow. Therefore, delete it.

Author: saser

WORKSPACE

@@ -44,13 +44,6 @@ http_archive(
     urls = ["https://github.com/bazelbuild/rules_docker/releases/download/v0.25.0/rules_docker-v0.25.0.tar.gz"],
 )
 
-load("@io_bazel_rules_docker//toolchains/docker:toolchain.bzl", docker_toolchain_configure = "toolchain_configure")
-
-docker_toolchain_configure(
-    name = "docker_config",
-    client_config = "//docker/config:config.json",
-)
-
 load("@io_bazel_rules_docker//repositories:repositories.bzl", container_repositories = "repositories")
 
 container_repositories()

docker/config/BUILD.bazel

@@ -1,6 +1,5 @@
 load("@io_bazel_rules_docker//go:image.bzl", "go_image")
 load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
-load("//gcp:container.bzl", "gcp_docker_push")
 
 go_library(
     name = "server_lib",
@@ -30,10 +29,3 @@ go_image(
     name = "server_image",
     binary = ":server",
 )
-
-gcp_docker_push(
-    name = "push_server_image_as_latest",
-    image = ":server_image",
-    repository = "tasks/server/server_image",
-    tag = "latest",
-)