greybus: arche-apb: platform data 'apb' is guaranteed to be valid

Platform data 'apb' is guaranteed to be valid in arche_apb_ctrl_remove()
and so no need to check it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/arche-apb-ctrl.c

@@ -352,9 +352,7 @@ int arche_apb_ctrl_remove(struct platform_device *pdev)
 {
 	struct arche_apb_ctrl_drvdata *apb = platform_get_drvdata(pdev);
 
-	if (apb)
 	apb_ctrl_cleanup(apb);
-
 	platform_set_drvdata(pdev, NULL);
 	unexport_gpios(apb);