tools: remove comment in eslint rule

I noticed this comment while working on a different task and could not
find any reason for it being there. Just bringing this up in case it was
overlooked.

PR-URL: https://github.com/nodejs/node/pull/13945
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

tools/eslint-rules/align-multiline-assignment.js

@@ -54,7 +54,6 @@ function testAssignment(context, node) {
 function testDeclaration(context, node) {
   node.declarations.forEach((declaration) => {
     const msg = checkExpressionAlignment(declaration.init);
-    // const start = declaration.init.loc.start;
     if (msg)
       context.report(node, msg);
   });