C#: Update nullness expected test output.

Author: michaelnebel

csharp/ql/test/query-tests/Nullness/NullCheck.expected

@@ -128,9 +128,6 @@
 | E.cs:382:58:382:67 | ... == ... | E.cs:382:58:382:59 | access to parameter e2 |
 | E.cs:384:13:384:22 | ... == ... | E.cs:384:13:384:14 | access to parameter e1 |
 | E.cs:384:27:384:36 | ... == ... | E.cs:384:27:384:28 | access to parameter e2 |
-| E.cs:391:9:391:9 | access to parameter i | E.cs:391:9:391:9 | access to parameter i |
-| E.cs:397:9:397:13 | access to parameter color | E.cs:397:9:397:13 | access to parameter color |
-| E.cs:404:9:404:9 | access to local variable i | E.cs:404:9:404:9 | access to local variable i |
 | E.cs:422:13:422:22 | access to property HasValue | E.cs:422:13:422:13 | access to parameter i |
 | E.cs:429:13:429:22 | access to property HasValue | E.cs:429:13:429:13 | access to parameter i |
 | E.cs:437:23:437:31 | ... is ... | E.cs:437:23:437:23 | access to parameter s |