Automatically prune unused Go dependencies

The way gazelle was set up meant that it would never prune any
dependencies from go_deps.bzl. I'm not exactly sure _why_, but that's
the way it behaved.

The new approach here in this patch is to essentially null out
go_deps.bzl and have gazelle regenerate it from scratch.

Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: Ic94020df816afa0df798b19b16b11272579793be
diff --git a/tools/ci/BUILD b/tools/ci/BUILD
index 7fa13d5..59b38ea 100644
--- a/tools/ci/BUILD
+++ b/tools/ci/BUILD
@@ -6,7 +6,7 @@
     importpath = "github.com/frc971/971-Robot-Code/tools/ci",
     target_compatible_with = ["@platforms//cpu:x86_64"],
     visibility = ["//visibility:private"],
-    deps = ["@com_github_buildkite_go_buildkite//buildkite:go_default_library"],
+    deps = ["@com_github_buildkite_go_buildkite//buildkite"],
 )
 
 go_binary(