TryGetInsertPositionFromDeclaration simplification

src/Features/CSharp/Portable/ChangeSignature/CSharpChangeSignatureService.cs

@@ -157,29 +157,6 @@ private static int TryGetSelectedIndexFromDeclaration(int position, SyntaxNode m
                 return null;
             }
 
-            if (parameters.Parameters.Count > 0 &&
-                parameters.Parameters.Last().Modifiers.Any(SyntaxKind.ParamsKeyword))
-            {
-                if (parameters.Parameters.Count == 1)
-                {
-                    // (params a)
-                    // (<new parameter> new comma ->, params a)
-                    return parameters.Parameters.FirstOrDefault().SpanStart;
-                }
-                else
-                {
-                    // (a, b, c, d put here ->, params e)
-                    // (a, b, c, d,<- new comma <new parameter>, params e)
-                    return parameters.Parameters.GetSeparators().Last().SpanStart;
-                }
-            }
-
-            // ( put here->)
-            // (,<- new comma for intellisense <new parameter>)
-            //
-            // (a, b, c, d put here->)
-            // (a, b, c, d,<- new comma <new parameter>)
-
             switch (parameters)
             {
                 case ParameterListSyntax parameterListSyntax:

src/Features/VisualBasic/Portable/ChangeSignature/VisualBasicChangeSignatureService.vb

@@ -132,15 +132,7 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.ChangeSignature
             Dim parameters = matchingNode.ChildNodes().OfType(Of ParameterListSyntax)().SingleOrDefault()
 
             If parameters Is Nothing Then
-                Return 0
-            End If
-
-            If parameters.Parameters.Count > 0 AndAlso parameters.Parameters.Last().Modifiers.Any(SyntaxKind.ParamArrayKeyword) Then
-                If parameters.Parameters.Count = 1 Then
-                    Return parameters.OpenParenToken.SpanStart + 1
-                Else
-                    Return parameters.Parameters.GetSeparators().Last().SpanStart
-                End If
+                Return Nothing
             End If
 
             Return parameters.CloseParenToken.SpanStart