Remove capacity from JsonDocument's constructor

examples/JsonFilterExample/JsonFilterExample.ino

@@ -34,12 +34,12 @@ void setup() {
       "1000000,\"timezone\":0,\"sunrise\":1581492085,\"sunset\":1581527294}}");
 
   // The filter: it contains "true" for each value we want to keep
-  JsonDocument filter(200);
+  JsonDocument filter;
   filter["list"][0]["dt"] = true;
   filter["list"][0]["main"]["temp"] = true;
 
   // Deserialize the document
-  JsonDocument doc(400);
+  JsonDocument doc;
   deserializeJson(doc, input_json, DeserializationOption::Filter(filter));
 
   // Print the result