boot: cleanup legacy args

Cleanup legacy boot script args, following removal of the legacy make
build system.

boot

@@ -4,19 +4,11 @@ import glob
 import os
 import os.path
 import sys
-import argparse
 from textwrap import dedent
 import subprocess
 import re
 import shutil
 
-cwd = os.getcwd()
-
-parser = argparse.ArgumentParser()
-parser.add_argument('--validate', action='store_true', help='Run in validate mode')
-parser.add_argument('--hadrian', action='store_true', help='Do not assume the make base build system')
-args = parser.parse_args()
-
 # Packages whose libraries aren't in the submodule root
 EXCEPTIONS = {
     'libraries/containers/': 'libraries/containers/containers/'

validate

@@ -259,7 +259,7 @@ if [ $build_only -eq 1 ] ||
 
     if [ $no_clean -eq 0 ]; then
         $hadrian clean && rm -rf $hadrian_build_root
-        python3 ./boot --validate
+        python3 ./boot
         $configure_cmd --enable-tarballs-autodownload $CONFIG_ARGS
     fi