⬆️ Maintenance: upgrades payments service requirements (#6848)

Author: pcrespov

services/payments/gateway/openapi.json

@@ -449,9 +449,6 @@
           },
           "docs_url": {
             "type": "string",
-            "maxLength": 2083,
-            "minLength": 1,
-            "format": "uri",
             "title": "Docs Url"
           }
         },
@@ -507,9 +504,6 @@
           },
           "token_type": {
             "type": "string",
-            "enum": [
-              "bearer"
-            ],
             "const": "bearer",
             "title": "Token Type"
           }