Clean up

Author: JamesNK

src/Servers/Kestrel/Core/src/Internal/Http2/Http2Stream.cs

@@ -695,23 +695,4 @@ void IPooledStream.DisposeCore()
     }
 
     long IPooledStream.PoolExpirationTicks => DrainExpirationTicks;
-
-    internal void ValidateHeaderValue(ReadOnlySpan<byte> name, ReadOnlySpan<byte> value)
-    {
-        // Validate the value doesn't contain newline characters.
-        // Doing this once when a value is added to the dynamic table avoids the need to repeat it every request.
-        if (ReferenceEquals(KestrelServerOptions.DefaultHeaderEncodingSelector, HttpRequestHeaders.EncodingSelector))
-        {
-            if (value.IndexOfAny((byte)'\r', (byte)'\n') >= 0)
-            {
-                throw new InvalidOperationException("Newline characters (CR/LF) are not allowed in request headers.");
-            }
-        }
-        else
-        {
-            // Errors if invalid new line characters are in header.
-            // Hacky: If a custom encoding selector is present then the name and value are allocated when value is added to dynamic table.
-            _ = value.GetRequestHeaderString(name.GetHeaderName(), HttpRequestHeaders.EncodingSelector, checkForNewlineChars: true);
-        }
-    }
 }