fix(learn): Added more robust logic for the remove test case in Create A Hash Table (#41283)

* Added extra test cases for hashtable.remove

* Minor Change

* Adjusted tests to use user created add function / Modified description

* Made test case description much more clear

* Changed instructions to be more clear

* Minor change to instructions

Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

curriculum/challenges/english/10-coding-interview-prep/data-structures/create-a-hash-table.md

@@ -20,6 +20,8 @@ Let's create the basic functionality of a hash table. We've created a naive hash
 
 Be sure to write your code to account for collisions!
 
+**Note:** The `remove` method tests won't pass until the `add` and `lookup` methods are correctly implemented.
+
 # --hints--
 
 The HashTable data structure should exist.
@@ -50,20 +52,6 @@ assert(
 );
 ```
 
-The HashTable should have a remove method.
-
-```js
-assert(
-  (function () {
-    var test = false;
-    if (typeof HashTable !== 'undefined') {
-      test = new HashTable();
-    }
-    return typeof test.remove === 'function';
-  })()
-);
-```
-
 The HashTable should have a lookup method.
 
 ```js
@@ -78,6 +66,20 @@ assert(
 );
 ```
 
+The HashTable should have a remove method.
+
+```js
+assert(
+  (function () {
+    var test = false;
+    if (typeof HashTable !== 'undefined') {
+      test = new HashTable();
+    }
+    return typeof test.remove === 'function';
+  })()
+);
+```
+
 The add method should add key value pairs and the lookup method should return the values associated with a given key.
 
 ```js
@@ -103,14 +105,40 @@ assert(
     if (typeof HashTable !== 'undefined') {
       test = new HashTable();
     }
-    test.add = addMethodSolution;
     test.add('key', 'value');
+
     test.remove('key');
     return !test.collection.hasOwnProperty(hashValue);
   })()
 );
 ```
 
+The remove method should only remove the correct key value pair.
+
+```js
+assert(
+  (function () {
+    var test = false;
+    var hashValue = hash('key');
+    if (typeof HashTable !== 'undefined') {
+      test = new HashTable();
+    }
+    test.add('key', 'value');
+    test.add('yek', 'value');
+    test.add('altKey', 'value');
+
+    test.remove('yek');
+    if (test.lookup('yek') || !test.lookup('key') || !test.lookup('altKey')) {
+      return false;
+    }
+
+    test.remove('key');
+
+    return !test.collection.hasOwnProperty(hashValue) && test.lookup('altKey');
+  })()
+);
+```
+
 Items should be added using the hash function.
 
 ```js
@@ -165,14 +193,6 @@ var hash = string => {
   }
   return hash;
 };
-
-var addMethodSolution = function(key, val) {
-    var theHash = hash(key);
-    if (!this.collection.hasOwnProperty(theHash)) {
-      this.collection[theHash] = {};
-    }
-    this.collection[theHash][key] = val;
-}
 ```
 
 ## --seed-contents--