rtc: s3c: remove unnecessary NULL assignment

It's unnecessary the code that assigns info->rtc_clk to NULL in
s3c_rtc_remove.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

drivers/rtc/rtc-s3c.c

@@ -425,7 +425,6 @@ static int s3c_rtc_remove(struct platform_device *pdev)
 	if (info->data->needs_src_clk)
 		clk_unprepare(info->rtc_src_clk);
 	clk_unprepare(info->rtc_clk);
-	info->rtc_clk = NULL;
 
 	return 0;
 }