ncurses: clean up

The patch was useless since version 6.0:
http://ncurses.scripts.mit.edu/?p=ncurses.git;h=6a530b46563470c2ca73579d1994a0c8e275dd98

component/ncurses/buildout.cfg

 [buildout]
-extends =
-  ../patch/buildout.cfg
 parts =
   ncurses
 
@@ -9,13 +7,10 @@ recipe = slapos.recipe.cmmi
 shared = true
 url = http://ftp.gnu.org/gnu/ncurses/ncurses-6.2.tar.gz
 md5sum = e812da327b1c2214ac1aed440ea3ae8d
-patch-options = -p1
-patches =
-  ${:_profile_base_location_}/ncurses-5.9-gcc-5.patch#57f4cd0cc0c0a42a5ddb2167f9546d72
 configure-options =
-  --prefix=@@LOCATION@@
+  --prefix=%(location)s
   --enable-pc-files
-  --with-pkg-config-libdir=@@LOCATION@@/lib/pkgconfig
+  --with-pkg-config-libdir=%(location)s/lib/pkgconfig
   --with-shared
   --without-ada
   --without-manpages
@@ -36,6 +31,5 @@ post-install =
 # pass dummy LDCONFIG to skip needless calling of ldconfig by non-root user
 environment =
   LDCONFIG=/bin/echo
-  PATH=${patch:location}/bin:%(PATH)s
 make-options =
   -j1

component/ncurses/ncurses-5.9-gcc-5.patch

-https://bugs.gentoo.org/545114
-
-extracted from the upstream change (which had many unrelated commits in one)
-
-From 97bb4678dc03e753290b39bbff30ba2825df9517 Mon Sep 17 00:00:00 2001
-From: "Thomas E. Dickey" <dickey@invisible-island.net>
-Date: Sun, 7 Dec 2014 03:10:09 +0000
-Subject: [PATCH] ncurses 5.9 - patch 20141206
-
-+ modify MKlib_gen.sh to work around change in development version of
-  gcc introduced here:
-	  https://gcc.gnu.org/ml/gcc-patches/2014-06/msg02185.html
-	  https://gcc.gnu.org/ml/gcc-patches/2014-07/msg00236.html
-  (reports by Marcus Shawcroft, Maohui Lei).
-
-diff --git a/ncurses/base/MKlib_gen.sh b/ncurses/base/MKlib_gen.sh
-index d8cc3c9..b91398c 100755
---- a/ncurses/base/MKlib_gen.sh
-+++ b/ncurses/base/MKlib_gen.sh
-@@ -474,11 +474,22 @@ sed -n -f $ED1 \
- 	-e 's/gen_$//' \
- 	-e 's/  / /g' >>$TMP
- 
-+cat >$ED1 <<EOF
-+s/  / /g
-+s/^ //
-+s/ $//
-+s/P_NCURSES_BOOL/NCURSES_BOOL/g
-+EOF
-+
-+# A patch discussed here:
-+#	https://gcc.gnu.org/ml/gcc-patches/2014-06/msg02185.html
-+# introduces spurious #line markers.  Work around that by ignoring the system's
-+# attempt to define "bool" and using our own symbol here.
-+sed -e 's/bool/P_NCURSES_BOOL/g' $TMP > $ED2
-+cat $ED2 >$TMP
-+
- $preprocessor $TMP 2>/dev/null \
--| sed \
--	-e 's/  / /g' \
--	-e 's/^ //' \
--	-e 's/_Bool/NCURSES_BOOL/g' \
-+| sed -f $ED1 \
- | $AWK -f $AW2 \
- | sed -f $ED3 \
- | sed \