test: fix minor stream-writableState linter error
Checklist
-
make -j8 test
(UNIX), orvcbuild test nosign
(Windows) passes -
commit message follows commit guidelines
Affected core subsystem(s)
test
Description of change
A minor linter error was introduced in a recent commit.
/Users/gib/wrk/com/DANGER/node/test/parallel/test-stream-writableState-ending.js
3:7 error 'common' is assigned a value but never used no-unused-vars
Refs: https://github.com/nodejs/node/pull/8707
cc/ @mcollina