qf: do not check baseline for clean-patches

The clean-patches command operates locally in the repository and doesn't
need the baseline to be checked, so just remove the check.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>