Stop catching subprocess.CalledProcessError. (No point in re-raising a degraded exception.)

scripts/osdriver.py

@@ -305,7 +305,6 @@ class Linux(Base):
 
     def gpt_device(self, dev_name):
         disk_dev = dev_name.rstrip('0123456789')
-        try:
         cmd = ['parted', disk_dev, '-s', 'print']
         with open(os.devnull) as devnull:
             p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
@@ -316,10 +315,6 @@ class Linux(Base):
             lang = os.getenv('LANG')
             encoding = lang.rsplit('.')[-1] if lang else 'utf-8'
             raise RuntimeError(str(_err_out, encoding))
-        except subprocess.CalledProcessError as e:
-            # Control is unlikely to reach here because Popen() is not
-            # supposed to raise this exception.
-            raise RuntimeError(str(e))
         subprocess.check_call(['partprobe', disk_dev])
         if b'msdos' in _cmd_out:
             return False