siteconfig: Drop siteconfig class/code/support

The siteconfig code was only used for 5 cache values. The complexity added to sstate
to support this code was considerable and the runtime much more significant than
any benefit the cache files would have added. Drop the support for this which
was only used minimally for ncurses and zlib.

(From OE-Core rev: f3766dc038f7ba9780ddaf5eb8d27385ea31d7d0)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/gen-site-config

@@ -1,43 +0,0 @@
-#! /bin/sh
-#  Copyright (c) 2005-2008 Wind River Systems, Inc.
-#
-# SPDX-License-Identifier: GPL-2.0-only
-#
-
-cat << EOF
-AC_PREREQ(2.57)
-AC_INIT([site_wide],[1.0.0])
-
-EOF
-
-# Disable as endian is set in the default config
-#echo AC_C_BIGENDIAN
-#echo
-
-if [ -e $1/types ] ; then
-  while read type ; do
-    echo "AC_CHECK_SIZEOF([$type])"
-  done < $1/types
-
-  echo
-fi
-
-if [ -e $1/funcs ]; then
-  while read func ; do
-    echo "AC_CHECK_FUNCS([$func])"
-  done < $1/funcs
-
-  echo
-fi
-
-if [ -e $1/headers ]; then
-  while read header ; do
-    echo "AC_CHECK_HEADERS([$header])"
-  done < $1/headers
-
-  echo
-fi
-
-cat << EOF
-AC_OUTPUT
-EOF