chore: Drop application host call, default to regions for info (#7457)

* chore: Drop application host call, default to regions for info

coderd/apidoc/docs.go

@@ -149,6 +149,7 @@ const docTemplate = `{
                 ],
                 "summary": "Get applications host",
                 "operationId": "get-applications-host",
+                "deprecated": true,
                 "responses": {
                     "200": {
                         "description": "OK",

coderd/apidoc/swagger.json

@@ -121,6 +121,7 @@
         "tags": ["Applications"],
         "summary": "Get applications host",
         "operationId": "get-applications-host",
+        "deprecated": true,
         "responses": {
           "200": {
             "description": "OK",

coderd/workspaceapps.go

@@ -27,6 +27,7 @@ import (
 // @Tags Applications
 // @Success 200 {object} codersdk.AppHostResponse
 // @Router /applications/host [get]
+// @Deprecated use api/v2/regions and see the primary proxy.
 func (api *API) appHost(rw http.ResponseWriter, r *http.Request) {
 	host := api.AppHostname
 	if host != "" && api.AccessURL.Port() != "" {