src: remove unused req_wrap-inl.h

[danbev]

This commit removes the inclusion of req_wrap-inl.h from
udp_wrap.h, and tty_wrap.cc as they are not used.

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

[danbev]

CI: https://ci.nodejs.org/job/node-test-pull-request/15123/

[danbev]

node-test-commit-linuxone failure looks unrelated

console output:

02:59:39 not ok 420 parallel/test-domain-timers
02:59:39   ---
02:59:39   duration_ms: 0.104
02:59:39   severity: fail
02:59:39   exitcode: 1
02:59:39   stack: |-
02:59:39     Mismatched <anonymous> function calls. Expected exactly 2, actual 1.
02:59:39         at Object.exports.mustCall (/data/iojs/build/workspace/node-test-commit-linuxone/nodes/rhel72-s390x/test/common/index.js:403:10)
02:59:39         at Object.<anonymous> (/data/iojs/build/workspace/node-test-commit-linuxone/nodes/rhel72-s390x/test/parallel/test-domain-timers.js:29:29)
02:59:39         at Module._compile (internal/modules/cjs/loader.js:702:30)
02:59:39         at Object.Module._extensions..js (internal/modules/cjs/loader.js:713:10)
02:59:39         at Module.load (internal/modules/cjs/loader.js:612:32)
02:59:39         at tryModuleLoad (internal/modules/cjs/loader.js:551:12)
02:59:39         at Function.Module._load (internal/modules/cjs/loader.js:543:3)
02:59:39         at Function.Module.runMain (internal/modules/cjs/loader.js:744:10)
02:59:39         at startup (internal/bootstrap/node.js:239:19)

03:00:51 not ok 1980 async-hooks/test-zlib.zlib-binding.deflate # TODO : Fix flaky test
03:00:51   ---
03:00:51   duration_ms: 0.140
03:00:51   severity: crashed
03:00:51   exitcode: -11
03:00:51   stack: |-

node-test-commit-windows-fanned failure looks unrelated

console output:

not ok 51 parallel/test-child-process-fork-net
  ---
  duration_ms: 0.324
  severity: fail
  exitcode: 1
  stack: |-
    PARENT: server listening
    CHILD: server listening
    CLIENT: connected
    PARENT: got connection
    CLIENT: connected
    CHILD: got connection
    CLIENT: closed
    CHILD: got connection
    CHILD: got connection
    CLIENT: closed
    CLIENT: connected
    CLIENT: connected
    CLIENT: closed
    CLIENT: closed
    PARENT: server closed
    testSocket, listening
    CHILD: got socket
    CLIENT: got data
    CLIENT: closed
    events.js:167
          throw er; // Unhandled 'error' event
          ^
    
    Error: write EPIPE
        at ChildProcess.target._send (internal/child_process.js:741:20)
        at ChildProcess.target.send (internal/child_process.js:625:19)
        at SocketListSend._request (internal/socket_list.js:20:16)
        at SocketListSend.close (internal/socket_list.js:40:10)
        at Server.close (net.js:1636:24)
        at Socket.<anonymous> (c:\workspace\node-test-binary-windows\test\parallel\test-child-process-fork-net.js:178:16)
        at Socket.emit (events.js:182:13)
        at TCP._handle.close [as _onclose] (net.js:596:12)
    Emitted 'error' event at:
        at process.nextTick (internal/child_process.js:745:39)
        at process._tickCallback (internal/process/next_tick.js:61:11)
  ...

[danbev]

Landed in c1a87a3.