xbps-src: remove proot chroot-style

proot is broken and result in random hard to debug issues,
this is the best way to not have new users use it.

common/chroot-style/proot.sh

@@ -1,30 +0,0 @@
-#!/bin/sh
-#
-# This chroot script uses proot (see http://proot.me)
-#
-readonly MASTERDIR="$1"
-readonly DISTDIR="$2"
-readonly HOSTDIR="$3"
-readonly EXTRA_ARGS="$4"
-shift 4
-
-if ! command -v proot >/dev/null 2>&1; then
-	exit 1
-fi
-
-if [ -z "$MASTERDIR" -o -z "$DISTDIR" ]; then
-	echo "$0 MASTERDIR/DISTDIR not set"
-	exit 1
-fi
-
-# proot does not properly return the resultcode. Workaround this
-RESULT=$(mktemp) || exit 1
-
-PROOT_NO_SECCOMP=1 proot -r $MASTERDIR -w / -b "$RESULT:/.result" -b $DISTDIR:/void-packages \
-	${HOSTDIR:+-b $HOSTDIR:/host} -b /proc:/proc -b /dev:/dev \
-	-b /sys:/sys $EXTRA_ARGS /bin/sh -c '$@; echo $? > /.result' $0 $@
-
-rv=$(cat "$RESULT")
-rm "$RESULT"
-
-exit $rv