Update quickstart.md

Author: oblomov-dev

docs/get_started/quickstart.md

@@ -47,18 +47,14 @@ CLASS zcl_my_abap2UI5_http_handler DEFINITION
   PUBLIC SECTION.
     INTERFACES if_http_service_extension.
 
-  PROTECTED SECTION.
-  PRIVATE SECTION.
 ENDCLASS.
 
 CLASS zcl_my_abap2UI5_http_handler IMPLEMENTATION.
-
   METHOD if_http_service_extension~handle_request.
 
     z2ui5_cl_http_handler=>run( req = request res = response ).
 
   ENDMETHOD.
-
 ENDCLASS.
 ```
 :::