media: staging: atomisp: Remove duplicate declaration in header

There are 3 declarations that are present in atomisp_platform.h and
atomisp_gmin_platform.h. Remove duplications from the latter.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/atomisp/include/linux/atomisp_gmin_platform.h

@@ -17,9 +17,6 @@
 
 #include "atomisp_platform.h"
 
-const struct atomisp_camera_caps *atomisp_get_default_camera_caps(void);
-const struct atomisp_platform_data *atomisp_get_platform_data(void);
-const struct camera_af_platform_data *camera_get_af_platform_data(void);
 int atomisp_register_i2c_module(struct v4l2_subdev *subdev,
                                 struct camera_sensor_platform_data *plat_data,
                                 enum intel_v4l2_subdev_type type);