Add ability to delete user icon (#3383)

* Add user icon delete route

By request of moderation, but also just generally nice to have

* Add relevant docs and frontend

* Add v2 version

apps/docs/public/openapi.yaml

@@ -1,7 +1,7 @@
 openapi: '3.0.0'
 
 info:
-  version: v2.7.0/15cf3fc
+  version: v2.7.0/366f528
   title: Labrinth
   termsOfService: https://modrinth.com/legal/terms
   contact:
@@ -3018,6 +3018,24 @@ paths:
                 $ref: '#/components/schemas/InvalidInputError'
         '404':
           description: The requested item(s) were not found or no authorization to access the requested item(s)
+    delete:
+      summary: Remove user's avatar
+      operationId: deleteUserIcon
+      tags:
+        - users
+      security:
+        - TokenAuth: ['USER_WRITE']
+      responses:
+        '204':
+          description: Expected response to a valid request
+        '400':
+          description: Request was invalid, see given error
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/InvalidInputError'
+        '404':
+          description: The requested item(s) were not found or no authorization to access the requested item(s)
   /user/{id|username}/projects:
     parameters:
       - $ref: '#/components/parameters/UserIdentifier'