Thermal: rcar: Remove redundant platform_set_drvdata()

Commit 0998d063 (device-core: Ensure drvdata = NULL when no
driver is bound) removes the need to set driver data field to
NULL.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NZhang Rui <rui.zhang@intel.com>

drivers/thermal/rcar_thermal.c

@@ -487,8 +487,6 @@ static int rcar_thermal_remove(struct platform_device *pdev)
 			rcar_thermal_irq_disable(priv);
 	}
 
-	platform_set_drvdata(pdev, NULL);
-
 	pm_runtime_put_sync(dev);
 	pm_runtime_disable(dev);