[BUG]Remove default values present in parameter descriptions.

[saimedhi]

What is the bug?

Remove default values present in parameter descriptions as they are present in schema[default].

How can one reproduce the bug?

example:

cluster.put_settings::query.flat_settings:
   in: query
   name: flat_settings
   description: 'Return settings in flat format (default: false)'
   schema:
     type: boolean
     default: false
   style: form