Remove Keybase integration (#17045)

app/controllers/api/v1/accounts/identity_proofs_controller.rb

@@ -5,8 +5,7 @@ class Api::V1::Accounts::IdentityProofsController < Api::BaseController
   before_action :set_account
 
   def index
-    @proofs = @account.suspended? ? [] : @account.identity_proofs.active
-    render json: @proofs, each_serializer: REST::IdentityProofSerializer
+    render json: []
   end
 
   private