Fix minor python code style issues
Fix some minor issues that were reported by pyflakes and pylint.
- Rename arguments to prevent redefinition of built-in 'dir'
- Rename method call to prevent redefinition of built-in 'help'
- Remove unused imports
- Prefix unused variable with underscore to prevent warning
Change-Id: Ia9e21c0f1a69af43f6e4566be46c31bdda540d2f
diff --git a/tools/pack_war.py b/tools/pack_war.py
index ba39856..7e7d895 100755
--- a/tools/pack_war.py
+++ b/tools/pack_war.py
@@ -15,7 +15,7 @@
from __future__ import print_function
from optparse import OptionParser
-from os import getcwd, chdir, makedirs, path, symlink
+from os import chdir, makedirs, path, symlink
from subprocess import check_call, check_output
import sys
