bazel: Remove unnecessary license comments

We get warnings when these are imported into google3.

Change-Id: I8daaef65c3ae35d81e75815460d659b53c122ee3
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/50580
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Keir Mierle <keir@google.com>
diff --git a/pw_thread/BUILD b/pw_thread/BUILD
index 828ccc9..3590e3e 100644
--- a/pw_thread/BUILD
+++ b/pw_thread/BUILD
@@ -21,7 +21,7 @@
 
 package(default_visibility = ["//visibility:public"])
 
-licenses(["notice"])  # Apache License 2.0
+licenses(["notice"])
 
 pw_cc_facade(
     name = "id_facade",