docs: removes additional cases to avoid the page being too long

Signed-off-by: Vincent Biret <vincentbiret@hotmail.com>

Author: baywet

csharp/ql/src/Linq/MissedWhereOpportunity.qhelp

@@ -31,7 +31,7 @@ on the even ones.</p>
 <p>This is far better expressed using the <code>Where</code> method.</p>
 <sample src="MissedWhereOpportunityFix.cs" />
 
-<p>The following examples should not use <code>Where</code>, because the matching branch exits the
+<p>The following example should not use <code>Where</code>, because the matching branch exits the
 method or iterator instead of continuing with filtered loop work.</p>
 <sample src="MissedWhereOpportunityGood.cs" />
 

csharp/ql/src/Linq/MissedWhereOpportunityGood.cs

@@ -10,24 +10,4 @@ class MissedWhereOpportunityGood
 
         return null;
     }
-
-    public System.Collections.Generic.IEnumerable<int> ValuesUntilFirstEven(System.Collections.Generic.IEnumerable<int> values)
-    {
-        foreach (int value in values)
-        {
-            if (value % 2 == 0)
-                yield break;
-
-            yield return value;
-        }
-    }
-
-    public void ThrowOnFirstEven(System.Collections.Generic.IEnumerable<int> values)
-    {
-        foreach (int value in values)
-        {
-            if (value % 2 == 0)
-                throw new System.InvalidOperationException("Unexpected even value.");
-        }
-    }
 }