Remove debug print statement for endpoint in Stack class

Author: reeshika-h

contentstack/src/main/java/com/contentstack/sdk/Stack.java

@@ -99,7 +99,6 @@ protected void setConfig(Config config) {
         }
         String endpoint = config.PROTOCOL + config.URL;
         this.config.setEndpoint(endpoint);
-        System.out.println("Endpoint:" + endpoint);
         client(endpoint);