[grocery-shopping] Remove learning outcomes and verification

Author: woojiahao

grocery_shopping/README.md

@@ -2,18 +2,10 @@
 
 <!--- Insert exercise description -->
 
-## Learning outcomes
-
-<!--- Insert exercise learning outcomes -->
-
 ## Task
 
 <!--- Insert exercise task, simplify what needs to be done -->
 
-## Verification
-
-Run `gitmastery verify` in this exercise folder.
-
 ## Hints
 
 <!--- Insert hints here -->