Addons: disable search filters for now (#11638)

* Addons: disable search filters for now

I'm disabling search filters until we implement the Admin UI page to customize
them.

It requires readthedocs/addons#391

* Update tests

readthedocs/proxito/tests/responses/v1.json

@@ -156,9 +156,7 @@
     "search": {
       "enabled": true,
       "default_filter": "project:project/latest",
-      "filters": [
-        ["Include subprojects", "subprojects:project/latest"]
-      ]
+      "filters": []
     }
   }
 }

readthedocs/proxito/views/hosting.py

@@ -477,12 +477,22 @@ def _v1(self, project, version, build, filename, url, request):
                 },
                 "search": {
                     "enabled": project.addons.search_enabled,
-                    # TODO: figure it out where this data comes from
+                    # TODO: figure it out where this data comes from.
+                    #
+                    # Originally, this was thought to be customizable by the user
+                    # adding these filters from the Admin UI.
+                    #
+                    # I'm removing this feature for now until we implement it correctly.
                     "filters": [
-                        [
-                            "Include subprojects",
-                            f"subprojects:{project.slug}/{version.slug}",
-                        ],
+                        # NOTE: this is an example of the structure of the this object.
+                        # It contains the name of the filter and the search syntax to prepend
+                        # to the user's query.
+                        # It uses "Search query sintax":
+                        # https://docs.readthedocs.io/en/stable/server-side-search/syntax.html
+                        # [
+                        #     "Include subprojects",
+                        #     f"subprojects:{project.slug}/{version.slug}",
+                        # ],
                     ]
                     if version
                     else [],