tools: remove superfluous regex in tools/doc/json.js

Remove noCallOrProp from tools/doc/json.js. It is a negative lookahead
that is only used in one regex where it is placed immediately before a
terminating $, thus rendering it meaningless.

PR-URL: https://github.com/nodejs/node/pull/33998


Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Jamie Davis <davisjam@vt.edu>