build/bindata: delete unused tooling

Change-Id: I4febbc6b5a8bf8dc9aa6aa1c56e5ae70214974ef
Reviewed-on: https://review.monogon.dev/c/monogon/+/3773
Tested-by: Jenkins CI
Reviewed-by: Hendrik Hofstadt <hendrik@monogon.tech>
diff --git a/build/sqlc/sqlc.bzl b/build/sqlc/sqlc.bzl
index cfaa3b1..985a301 100644
--- a/build/sqlc/sqlc.bzl
+++ b/build/sqlc/sqlc.bzl
@@ -55,8 +55,7 @@
     importpath_parts = ctx.attr.importpath.split("/")
     package_name = importpath_parts[-1]
 
-    # Split migrations into 'up' and 'down'. Only pass 'up' to sqlc. Use both
-    # to generate golang-migrate compatible bindata.
+    # Split migrations into 'up' and 'down'. Only pass 'up' to sqlc.
     uppers, _ = _parse_migrations(ctx.files.migrations)
 
     # Make sure given queries have no repeating basenames. This ensures clean
@@ -158,12 +157,6 @@
             executable = True,
             cfg = "exec",
         ),
-        "_bindata": attr.label(
-            default = Label("@com_github_kevinburke_go_bindata//go-bindata"),
-            allow_single_file = True,
-            executable = True,
-            cfg = "exec",
-        ),
     },
     toolchains = ["@io_bazel_rules_go//go:toolchain"],
 )