tools: remove exception for Node.js 8 and earlier

Remove exception in .eslintrc.js to accommodate versions of Node.js
prior to 10.x. 10.x and later all support omitting catch block
arguments.

PR-URL: https://github.com/nodejs/node/pull/38840


Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>