dev-util/mingw64-runtime: drop prepstrip(), bug #587292

This disables all stripping in mingw64-runtime. As PMS does
not provide an alternative just drop stripping for now.

Reported-by: Michał Górny
Closes: https://bugs.gentoo.org/587292
Package-Manager: Portage-2.3.52, Repoman-2.3.12
Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>

dev-util/mingw64-runtime/mingw64-runtime-5.0.4.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2018 Gentoo Foundation
+# Copyright 1999-2018 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
@@ -103,6 +103,5 @@ src_install() {
 		dosym usr/include /usr/${CTARGET}/sys-include
 	fi
 
-	env -uRESTRICT CHOST=${CTARGET} prepallstrip
 	rm -rf "${ED}/usr/share"
 }

dev-util/mingw64-runtime/mingw64-runtime-6.0.0-r1.ebuild

@@ -108,6 +108,5 @@ src_install() {
 		dosym usr/include /usr/${CTARGET}/sys-include
 	fi
 
-	env -uRESTRICT CHOST=${CTARGET} prepallstrip
 	rm -rf "${ED}/usr/share"
 }