pinctrl: remove orphaned exported ".remove" function

The Kconfig currently controlling compilation of this code is:

drivers/pinctrl/freescale/Kconfig:config PINCTRL_MXS
drivers/pinctrl/freescale/Kconfig: bool

...meaning that it currently is not being built as a module by anyone.

It also doesn't have any modular functionality, so it doesn't need
module.h included at all.

What it does have is an exported function that was used as a shared
".remove" by other drivers, but those use cases (imx23 and imx28)
are now gone, and hence this can disappear as well.

Cc: Linus Walleij <[e-mail]>
Cc: [e-mail]
Signed-off-by: Paul Gortmaker <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/freescale/pinctrl-mxs.c

···
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/io.h>
-#include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/pinctrl/machine.h>
···
 	return ret;
 }
 EXPORT_SYMBOL_GPL(mxs_pinctrl_probe);
-
-int mxs_pinctrl_remove(struct platform_device *pdev)
-{
-	struct mxs_pinctrl_data *d = platform_get_drvdata(pdev);
-
-	pinctrl_unregister(d->pctl);
-	iounmap(d->base);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(mxs_pinctrl_remove);

drivers/pinctrl/freescale/pinctrl-mxs.h

···
 
 int mxs_pinctrl_probe(struct platform_device *pdev,
 		      struct mxs_pinctrl_soc_data *soc);
-int mxs_pinctrl_remove(struct platform_device *pdev);
 
 #endif /* __PINCTRL_MXS_H */