Remove the file list endpoint as it isn't used in our services

• Remove the file list endpoint as it isn't used in our services

This API has particularly bad performance due to the size of the download file table, due to the need to do raw calls to count over the very large dataset. Combined with the fact that this was added initially as an extra endpoint and not because it was legacy code, it is being removed.

spec/openapi.yaml

@@ -17,22 +17,6 @@ tags:
     description: Definitions in relation to retrieval of mailing lists
 
 paths:
-  /file:
-    get:
-      tags:
-        - Files
-      summary: List of files
-      description: Returns a list of all file index metadata
-      responses:
-        200:
-          description: Success
-          content:
-            application/json:
-              schema:
-                $ref: "#/components/schemas/Files"
-        500:
-          description: Error while retrieving data
-
   /file/{file_id}:
     parameters:
       - name: file_id