[1.0.X] Removed support for passing params as dicts in the oracle backend....

[1.0.X] Removed support for passing params as dicts in the oracle backend. Wasn't documented, didn't work, isn't necessary.  Backport of [9418] from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9419 bcc190cf-cafb-0310-a4f2-bffc1f526a37