chore: switch to Aspect Workflows on Buildkite

Author: gregmagolan

.aspect/workflows/README.md

@@ -1,5 +1,4 @@
-# See https://docs.aspect.build/workflows/config
----
+# See https://docs.aspect.build/workflows/configuration
 tasks:
     - format:
           queue: aspect-small

.aspect/workflows/config.yaml

@@ -1,5 +1,4 @@
 load("@aspect_bazel_lib//lib:bazelrc_presets.bzl", "write_aspect_bazelrc_presets")
-load("@aspect_bazel_lib//lib:write_source_files.bzl", "write_source_file")
 load("@bazel_skylib//:bzl_library.bzl", "bzl_library")
 
 write_aspect_bazelrc_presets(
@@ -10,12 +9,6 @@ write_aspect_bazelrc_presets(
     ],
 )
 
-write_source_file(
-    name = "aspect_workflows_reusable",
-    in_file = "@aspect_workflows_action//:.github/workflows/.aspect-workflows-reusable.yaml",
-    out_file = ".aspect-workflows-reusable.yaml",
-)
-
 bzl_library(
     name = "deps",
     srcs = ["deps.bzl"],