Remove static build script

I'm not building static binaries for the 1.x branch anymore, the Zig
version replaces those binaries just fine.

static/build.sh

-#!/bin/sh
-
-# This script is based on static/build.sh from the ncdc git repo.
-# Only i486 and arm arches are supported. i486 should perform well enough, so
-# x86_64 isn't really necessary. I can't test any other arches.
-#
-# This script assumes that you have the musl-cross cross compilers installed in
-# $MUSL_CROSS_PATH.
-#
-# Usage:
-#   ./build.sh $arch
-#   where $arch = 'arm', 'i486' or 'x86_64'
-
-MUSL_CROSS_PATH=/opt/cross
-NCURSES_VERSION=6.2
-
-export CFLAGS="-O3 -g -static"
-
-# (The variables below are automatically set by the functions, they're defined
-# here to make sure they have global scope and for documentation purposes.)
-
-# This is the arch we're compiling for, e.g. arm/mipsel.
-TARGET=
-# This is the name of the toolchain we're using, and thus the value we should
-# pass to autoconf's --host argument.
-HOST=
-# Installation prefix.
-PREFIX=
-# Path of the extracted source code of the package we're currently building.
-srcdir=
-
-mkdir -p tarballs
-
-
-# "Fetch, Extract, Move"
-fem() { # base-url name targerdir extractdir
-  echo "====== Fetching and extracting $1 $2"
-  cd tarballs
-  if [ -n "$4" ]; then
-    EDIR="$4"
-  else
-    EDIR=$(basename $(basename $(basename $2 .tar.bz2) .tar.gz) .tar.xz)
-  fi
-  if [ ! -e "$2" ]; then
-    wget "$1$2" || exit
-  fi
-  if [ ! -d "$3" ]; then
-    tar -xvf "$2" || exit
-    mv "$EDIR" "$3"
-  fi
-  cd ..
-}
-
-
-prebuild() { # dirname
-  if [ -e "$TARGET/$1/_built" ]; then
-    echo "====== Skipping build for $TARGET/$1 (assumed to be done)"
-    return 1
-  fi
-  echo "====== Starting build for $TARGET/$1"
-  rm -rf "$TARGET/$1"
-  mkdir -p "$TARGET/$1"
-  cd "$TARGET/$1"
-  srcdir="../../tarballs/$1"
-  return 0
-}
-
-
-postbuild() {
-  touch _built
-  cd ../..
-}
-
-
-getncurses() {
-  fem http://ftp.gnu.org/pub/gnu/ncurses/ ncurses-$NCURSES_VERSION.tar.gz ncurses
-  prebuild ncurses || return
-  $srcdir/configure --prefix=$PREFIX\
-    --without-cxx --without-cxx-binding --without-ada --without-manpages --without-progs\
-    --without-tests --without-curses-h --without-pkg-config --without-shared --without-debug\
-    --without-gpm --without-sysmouse --enable-widec --with-default-terminfo-dir=/usr/share/terminfo\
-    --with-terminfo-dirs=/usr/share/terminfo:/lib/terminfo:/usr/local/share/terminfo\
-    --with-fallbacks="screen linux vt100 xterm xterm-256color" --host=$HOST\
-    CPPFLAGS=-D_GNU_SOURCE || exit
-  make || exit
-  make install.libs || exit
-  postbuild
-}
-
-
-getncdu() {
-  prebuild ncdu || return
-  srcdir=../../..
-  $srcdir/configure --host=$HOST --with-ncursesw PKG_CONFIG=false\
-    CPPFLAGS="-I$PREFIX/include -I$PREFIX/include/ncursesw"\
-    LDFLAGS="-static -L$PREFIX/lib -lncursesw" CFLAGS="$CFLAGS -Wall -Wextra" || exit
-  make || exit
-
-  VER=`cd '../../..' && git describe --abbrev=5 --dirty= | sed s/^v//`
-  tar -czf ../../ncdu-linux-$TARGET-$VER-unstripped.tar.gz ncdu
-  $HOST-strip ncdu
-  tar -czf ../../ncdu-linux-$TARGET-$VER.tar.gz ncdu
-  echo "====== ncdu-linux-$TARGET-$VER.tar.gz and -unstripped created."
-
-  postbuild
-}
-
-
-buildarch() {
-  TARGET=$1
-  case $TARGET in
-    arm)    HOST=arm-linux-musleabi  DIR=arm-linux-musleabi ;;
-    aarch64)HOST=aarch64-linux-musl  DIR=aarch64-linux-musl ;;
-    i486)   HOST=i486-linux-musl     DIR=i486-linux-musl    ;;
-    x86_64) HOST=x86_64-linux-musl   DIR=x86_64-linux-musl  ;;
-    *)      echo "Unknown target: $TARGET" ;;
-  esac
-  PREFIX="`pwd`/$TARGET/inst"
-  mkdir -p $TARGET $PREFIX
-  ln -s lib $PREFIX/lib64
-
-  OLDPATH="$PATH"
-  export PATH="$PATH:$MUSL_CROSS_PATH/$DIR/bin"
-  getncurses
-  getncdu
-  PATH="$OLDPATH"
-}
-
-
-buildarch $1