Remove AppleWin code from DLLLauncherMain.cpp
Pull request: https://github.com/WebKit/WebKit/pull/10611
Committed 260768@main (bd7aade58f9b): <https://commits.webkit.org/260768@main> Reviewed commits have been landed. Closing PR #10611 and removing active labels.
<rdar://problem/105854289>