Remove duplicated location_id param (#340)

## What changed?
<!-- Provide a bulleted list in the present tense -->
* Remove duplicated parameter `location_id`

ping @slsriehl @bc-tgomez

Co-authored-by: Tina Gomez <94003415+bc-tgomez@users.noreply.github.com>

reference/locations.v3.yml

@@ -186,11 +186,6 @@ paths:
   '/inventory/locations/{location_id}/metafields':
     parameters:
       - $ref: '#/components/parameters/Accept'
-      - schema:
-          type: string
-        name: location_id
-        in: path
-        required: true
     get:
       summary: Get Metafields
       description: Retrieve metafields for a location.