Remove VB from supported languages in CA1844

Author: gewarren

docs/fundamentals/code-analysis/quality-rules/ca1844.md

@@ -11,7 +11,6 @@ helpviewer_keywords:
 author: NewellClark
 dev_langs:
 - CSharp
-- VB
 ---
 # CA1844: Provide memory-based overrides of async methods when subclassing 'Stream'