clean up javascript files

05_hash_tables/01_price_of_groceries.js

@@ -1,10 +0,0 @@
-'use strict';
-
-const book = {};
-// an apple costs 67 cents
-book['apple'] = 0.67;
-// milk costs $1.49
-book['milk'] = 1.49;
-book['avocado'] = 1.49;
-
-console.log(book); // { apple: 0.67, milk: 1.49, avocado: 1.49 }

05_hash_tables/02_check_voter.js

@@ -1,16 +0,0 @@
-'use strict';
-
-const voted = {};
-function check_voter(name) {
-  if (voted[name]) {
-    console.log('kick them out!');
-  } else {
-    voted[name] = true;
-    console.log('let them vote!');
-  }
-}
-
-
-check_voter("tom"); // let them vote!
-check_voter("mike"); // let them vote!
-check_voter("mike"); // kick them out!