dev-lang/python: remove threads USE flag

Threads are always enabled in Python 3.7.

Package-Manager: Portage-2.3.40_p15, Repoman-2.3.9_p247

dev-lang/python/python-3.7.0.ebuild

@@ -17,7 +17,7 @@ SRC_URI="https://www.python.org/ftp/python/${PV}/${MY_P}.tar.xz
 LICENSE="PSF-2"
 SLOT="3.7/3.7m"
 KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~amd64-fbsd ~x86-fbsd"
-IUSE="bluetooth build examples gdbm hardened ipv6 libressl +ncurses +readline sqlite +ssl test +threads tk wininst +xml"
+IUSE="bluetooth build examples gdbm hardened ipv6 libressl +ncurses +readline sqlite +ssl test tk wininst +xml"
 RESTRICT="!test? ( test )"
 
 # Do not add a dependency on dev-lang/python to this ebuild.
@@ -139,12 +139,6 @@ src_configure() {
 	)
 
 	OPT="" econf "${myeconfargs[@]}"
-
-	if use threads && grep -q "#define POSIX_SEMAPHORES_NOT_ENABLED 1" pyconfig.h; then
-		eerror "configure has detected that the sem_open function is broken."
-		eerror "Please ensure that /dev/shm is mounted as a tmpfs with mode 1777."
-		die "Broken sem_open function (bug 496328)"
-	fi
 }
 
 src_compile() {
@@ -238,7 +232,6 @@ src_install() {
 	use sqlite || rm -r "${libdir}/"{sqlite3,test/test_sqlite*} || die
 	use tk || rm -r "${ED%/}/usr/bin/idle${PYVER}" "${libdir}/"{idlelib,tkinter,test/test_tk*} || die
 
-	use threads || rm -r "${libdir}/multiprocessing" || die
 	use wininst || rm "${libdir}/distutils/command/"wininst-*.exe || die
 
 	dodoc "${S}"/Misc/{ACKS,HISTORY,NEWS}