remove unrelated comment

Co-authored-by: Antoine du Hamel <[email protected]>

Author: Theo-Steiner

lib/repl.js

@@ -861,7 +861,6 @@ function REPLServer(prompt,
       // code alignment
       const matches = self._sawKeyPress ?
         RegExpPrototypeExec(/^\s+/, cmd) : null;
-      // Preserve indentation in editorMode
       if (matches) {
         const prefix = matches[0];
         self.write(prefix);