github: don't auto-add kind/bug labels

kind labels should only be manually added by maintainers after
confirming the issue. Otherwise, it can be tricky to sort through all
the issues when filtering for legitimate bugs.

Signed-off-by: Justin Chadwell <me@jedevc.com>

.github/ISSUE_TEMPLATE/bug.yml

@@ -2,7 +2,6 @@
 name: Bug Report
 description: Report a bug
 labels:
-  - kind/bug
   - status/triage
 
 body: