regulator: mcp16502: Drop useless header

The mcp16502 regulator driver includes the legacy header
<linux/gpio.h> for no reason, it is already using the proper
<linux/gpio/consumer.h> include. Drop the include.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230808-descriptors-regulator-v1-7-939b5e84dd18@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/mcp16502.c

@@ -8,7 +8,6 @@
 //
 // Inspired from tps65086-regulator.c
 
-#include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/init.h>
 #include <linux/kernel.h>