[dev-libs/Ice] drop most keywords due to introduction of passlib dependency

dev-libs/Ice/Ice-3.6.1.ebuild

@@ -25,7 +25,7 @@ SRC_URI="https://github.com/zeroc-ice/ice/archive/v${PV}.tar.gz -> ${P}.tar.gz
 	doc? ( http://www.zeroc.com/download/Ice/$(get_version_component_range 1-2)/${P}.pdf )"
 LICENSE="GPL-2"
 SLOT="0/${PV}"
-KEYWORDS="~amd64 ~arm ~ia64 ~x86 ~x86-linux ~x64-macos"
+KEYWORDS="~amd64 ~x86"
 IUSE="doc examples libressl +ncurses mono php php_namespaces python ruby test debug"
 
 RDEPEND=">=dev-libs/expat-2.0.1