Delete password_manager.cc from its old location -- it was moved into component.

password_manager.cc was moved into components/password_manager/ in
crrev.com/254117, but a copy was accidentally left in the old location. All gypfile
references were updated in that CL.

BUG=334642
R=blundell@chromium.org

Review URL: https://codereview.chromium.org/180633003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254456 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254456