Remove unnecessary double-shell.

Default shell for ChromeOS test image is bash. The line in question causes an extra instance of bash to be spawned.

Removing the line fixes the shell-init errors.

Change-Id: Icea100dc3c4f5dbf12f2185213a64afe528cacbf

BUG=chromium-os:9425
TEST=Ran in production. Errors disappeared.

Committed: http://chrome-svn/viewvc/chromeos?view=rev&revision=2e6c8a2

Review URL: http://codereview.chromium.org/5515009
diff --git a/client/common_lib/utils.py b/client/common_lib/utils.py
index a6fa61d..101599b 100644
--- a/client/common_lib/utils.py
+++ b/client/common_lib/utils.py
@@ -79,7 +79,7 @@
                                    # Default shell in ChromeOS test image is
                                    # already bash. We're seeing shell-init
                                    # errors if this value is set.
-                                   
+
                                    #executable="/bin/bash",
                                    stdin=stdin)