src: remove unnecessary helper function
Ever since e2fcfea4, OnReadCommon()
is no longer shared between more than one function.
CI: https://ci.nodejs.org/job/node-test-pull-request/9770/
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines
Affected core subsystem(s)
- lib / src