Use default delay in retry middleware

Author: jbelien

Command/OverpassCommand.php

@@ -122,9 +122,6 @@ function ($retries, $request, $response, $exception) {
                 }
 
                 return false;
-            },
-            function ($retries) {
-                return pow(2, $retries) * 1000;
             }
         );
 

Command/WikidataCommand.php

@@ -204,9 +204,6 @@ function ($retries, $request, $response, $exception) {
                 }
 
                 return false;
-            },
-            function ($retries) {
-                return pow(2, $retries) * 1000;
             }
         );