config-host.mak: remove unused compiler-related lines

Most of the build is not done via Makefiles, therefore the toolchain
variables are mostly unused.  They are still used by tests/tcg
and pc-bios/roms, but most of them are not needed there.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configure

@@ -521,9 +521,6 @@ query_pkg_config() {
 pkg_config=query_pkg_config
 sdl2_config="${SDL2_CONFIG-${cross_prefix}sdl2-config}"
 
-# If the user hasn't specified ARFLAGS, default to 'rv', just as make does.
-ARFLAGS="${ARFLAGS-rv}"
-
 # default flags for all hosts
 # We use -fwrapv to tell the compiler that we require a C dialect where
 # left shift of signed integers is well defined and has the expected
@@ -4917,19 +4914,12 @@ echo "HOST_CC=$host_cc" >> $config_host_mak
 if $iasl -h > /dev/null 2>&1; then
   echo "CONFIG_IASL=$iasl" >> $config_host_mak
 fi
-echo "CXX=$cxx" >> $config_host_mak
-echo "OBJCC=$objcc" >> $config_host_mak
 echo "AR=$ar" >> $config_host_mak
-echo "ARFLAGS=$ARFLAGS" >> $config_host_mak
 echo "AS=$as" >> $config_host_mak
 echo "CCAS=$ccas" >> $config_host_mak
 echo "CPP=$cpp" >> $config_host_mak
 echo "OBJCOPY=$objcopy" >> $config_host_mak
 echo "LD=$ld" >> $config_host_mak
-echo "RANLIB=$ranlib" >> $config_host_mak
-echo "NM=$nm" >> $config_host_mak
-echo "PKG_CONFIG=$pkg_config_exe" >> $config_host_mak
-echo "WINDRES=$windres" >> $config_host_mak
 echo "CFLAGS_NOPIE=$CFLAGS_NOPIE" >> $config_host_mak
 echo "QEMU_CFLAGS=$QEMU_CFLAGS" >> $config_host_mak
 echo "QEMU_CXXFLAGS=$QEMU_CXXFLAGS" >> $config_host_mak

meson.build

@@ -2765,7 +2765,6 @@ if targetos == 'windows'
     summary_info += {'Windows SDK':   config_host['WIN_SDK']}
   endif
 endif
-summary_info += {'ARFLAGS':           config_host['ARFLAGS']}
 summary_info += {'CFLAGS':            ' '.join(get_option('c_args')
                                                + ['-O' + get_option('optimization')]
                                                + (get_option('debug') ? ['-g'] : []))}