Commit 44626dc7 (MSVC: Windows-native implementation for subset
of threads API, 2010-01-15) introduces builtin replacement of
pthreadGC2.dll functionality, thus we can completely drop
dependency on this dll.
Signed-off-by: Michael Lukashov <michael.lukashov@gmail.com> Acked-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>