Remove deprecated TYPE in rest_client

This commit removes the deprecated TYPE variable in rest_client. We
already deprecated this last year[1]. So I think we can remove this.

[1] I8a2e21d6c87a58b0335dbc66bb5a242953dfbd14

Change-Id: Ieb713513dd0e01e7a634ead890a50cc0c72b5dea
2 files changed