gistfile1.cs

public class EmtpyStatementRemoval : CSharpSyntaxRewriter
{
    public override SyntaxNode VisitEmptyStatement(EmptyStatementSyntax node)
    {
        //Simply remove all Empty Statements
        return null;
    }
}

public static void Main(string[] args)
{
    //A syntax tree with an unnecessary semicolon on its own line
    var tree = CSharpSyntaxTree.ParseText(@"
    public class Sample
    {
       public void Foo()
       {
          Console.WriteLine();
          ;
        }
    }");

    var rewriter = new EmtpyStatementRemoval();
    var result = rewriter.Visit(tree.GetRoot());
    Console.WriteLine(result.ToFullString());
}