wic: code cleanup

Fixed indentation, unused imports, trailing lines etc.

[YOCTO #10619]

(From OE-Core rev: 5fa7768bfb4b6d464c6a812822b0665f52e7bea4)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/wic/utils/misc.py

@@ -77,18 +77,15 @@ def _exec_cmd(cmd_and_args, as_shell=False, catch=3):
     msger.debug("_exec_cmd: output for %s (rc = %d): %s" % \
                 (cmd_and_args, ret, out))
 
-    return (ret, out)
+    return ret, out
 
 
 def exec_cmd(cmd_and_args, as_shell=False, catch=3):
     """
-    Execute command, catching stderr, stdout
-
-    Exits if rc non-zero
+    Execute command, return output
     """
-    ret, out = _exec_cmd(cmd_and_args, as_shell, catch)
+    return _exec_cmd(cmd_and_args, as_shell, catch)[1]
 
-    return out
 
 def exec_native_cmd(cmd_and_args, native_sysroot, catch=3, pseudo=""):
     """

scripts/lib/wic/utils/partitionedfs.py

@@ -21,7 +21,7 @@
 import os
 from wic import msger
 from wic.utils.errors import ImageError
-from wic.utils.misc import exec_cmd, exec_native_cmd
+from wic.utils.misc import exec_native_cmd
 from wic.filemap import sparse_copy
 
 # Overhead of the MBR partitioning scheme (just one sector)
@@ -350,10 +350,9 @@ class Image():
         if self.disks:
             for dev in self.disks:
                 disk = self.disks[dev]
-                try:
+                if hasattr(disk['disk'], 'cleanup'):
                     disk['disk'].cleanup()
-                except:
-                    pass
+
         # remove partition images
         for image in self.partimages:
             if os.path.isfile(image):