ci: rm allow-unused from nolintlint settings

This was added by commit 84e42877a ("make lint: re-enable revive"),
making nolintlint became almost useless.

Remove the ungodly amount of unused nolint annotations.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

.golangci.yml

@@ -58,7 +58,6 @@ linters-settings:
   errcheck:
     check-blank: false
   nolintlint:
-    allow-unused: true
     require-specific: true
   revive:
     rules: