scripts: west_commands: zephyr_ext_common: Remove deprecated west.log

The global state west.log is deprecated, replace with WestCommand
logging.

Signed-off-by: Pieter De Gendt <pieter.degendt@basalte.be>

scripts/west_commands/zephyr_ext_common.py

@@ -12,7 +12,6 @@ import os
 import shlex
 from pathlib import Path
 
-from west import log
 from west.commands import WestCommand
 
 # This relies on this file being zephyr/scripts/foo/bar.py.
@@ -44,8 +43,8 @@ class Forceable(WestCommand):
         self.args.force being True can allow execution to proceed.
         '''
         if not (cond or self.args.force):
-            log.err(msg)
-            log.die('refusing to proceed without --force due to above error')
+            self.err(msg)
+            self.die('refusing to proceed without --force due to above error')
 
     def config_get_words(self, section_key, fallback=None):
         unparsed = self.config.get(section_key)