build-cross-aarch64.sh script removed

for aarch64 cross-build use `HOST=aarch64-linux-gnu zcutil/build.sh` followed by optional parameters

zcutil/build-cross-aarch64.sh

@@ -1,64 +0,0 @@
-#!/bin/bash
-# Copyright (c) 2019-2020 radix42
-# Copyright (c) 2019-2020 The Hush developers
-# Original aarch64 port by radix42. Thank you!
-
-set -eu -o pipefail
-
-cat <<'EOF'
- ________________
-< Building Hush! >
- ----------------
-        \   ^__^
-         \  (oo)\_______
-            (__)\       )\/\
-                ||----w |
-                ||     ||
-EOF
-
-if [ "x$*" = 'x--help' ]
-then
-    cat ./zcutil/dragon.txt
-    cat <<EOF
-Welcome To The Hush Build System, Here Be Dragons!
-Usage:
-$0 --help
-  Show this help message and exit.
-$0 [ --enable-lcov ] [ MAKEARGS... ]
-  Build Hush and most of its transitive dependencies from
-  source. MAKEARGS are applied to both dependencies and Hush itself. If
-  --enable-lcov is passed, Hush is configured to add coverage
-  instrumentation, thus enabling "make cov" to work.
-EOF
-    exit 0
-fi
-
-set -x
-cd "$(dirname "$(readlink -f "$0")")/.."
-
-# If --enable-lcov is the first argument, enable lcov coverage support:
-LCOV_ARG=''
-HARDENING_ARG='--disable-hardening'
-if [ "x${1:-}" = 'x--enable-lcov' ]
-then
-    LCOV_ARG='--enable-lcov'
-    HARDENING_ARG='--disable-hardening'
-    shift
-fi
-
-# BUG: parameterize the platform/host directory:
-PREFIX="$(pwd)/depends/aarch64-linux-gnu/"
-
-HOST=aarch64-linux-gnu make "$@" -C ./depends/ V=1 NO_QT=1
-./autogen.sh
-CONFIG_SITE="$(pwd)/depends/aarch64-linux-gnu/share/config.site" ./configure --prefix="${PREFIX}" --with-gui=no --enable-tests=no "$HARDENING_ARG" "$LCOV_ARG" CXXFLAGS='-fwrapv -fno-strict-aliasing -g'
-
-#BUILD CCLIB
-
-WD=$PWD
-cd src/cc
-echo $PWD
-HOST=aarch64-linux-gnu ./makecustom
-cd $WD
-
-make "$@" V=1