docs: Make remove-linkifiers use curl example system.

templates/zerver/api/remove-linkifiers.md

@@ -15,10 +15,7 @@ in messages and topics.
 
 {tab|curl}
 
-``` curl
-curl -X DELETE {{ api_url }}/v1/realm/filters/{filter_id} \
-    -u BOT_EMAIL_ADDRESS:BOT_API_KEY
-```
+{generate_code_example(curl)|/realm/filters/{filter_id}:delete|example}
 
 {end_tabs}
 

zerver/openapi/test_curl_examples.py

@@ -27,8 +27,10 @@ exclude_list = [
     'create-user-group.md',
     'update-user-group.md',
     'delete-user-group.md',
+    'add-linkifiers.md',
     # Endpoint can be called only by administrators.
     'create-user.md',
+    'remove-linkifiers.md',
     # Endpoint does not accept bot requests
     'get-user-groups.md',
 ]