Fix wrong url used

lib/warehouse.dart

@@ -44,7 +44,7 @@ Future<String> deleteContainer(int container) async {
 }
 
 Future<String> deleteLocation(String location) async {
-    final response = await http.delete(Uri.https(await getUrl(), "container/$location"));
+    final response = await http.delete(Uri.https(await getUrl(), "location/$location"));
 
     if(response.statusCode == 200) {
         return response.body;