Remove snippets_binary_blob FF

Remove the unused
snippets_binary_blob
feature flag.

Changelog: other

config/feature_flags/development/snippets_binary_blob.yml

----
-name: snippets_binary_blob
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/37419
-rollout_issue_url: 
-milestone: '13.3'
-type: development
-group: group::editor
-default_enabled: false

lib/gitlab/gon_helper.rb

@@ -52,7 +52,6 @@ module Gitlab
 
       # Initialize gon.features with any flags that should be
       # made globally available to the frontend
-      push_frontend_feature_flag(:snippets_binary_blob, default_enabled: false)
       push_frontend_feature_flag(:usage_data_api, type: :ops, default_enabled: :yaml)
       push_frontend_feature_flag(:security_auto_fix, default_enabled: false)
       push_frontend_feature_flag(:improved_emoji_picker, default_enabled: :yaml)