of: remove duplicate declarations of __of_*_sysfs() functions

When CONFIG_OF_KOBJ was introduced in commit b56b5528f5b3 ("of: make
kobject and bin_attribute support configurable") and #ifdef-ed
versions of these declarations got added, the originals didn't get
removed.

Fixes: b56b5528f5b3 ("of: make kobject and bin_attribute support configurable")
Signed-off-by: Zev Weiss <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rob Herring <[e-mail]>

drivers/of/of_private.h

···
 extern const void *__of_get_property(const struct device_node *np,
 				     const char *name, int *lenp);
 extern int __of_add_property(struct device_node *np, struct property *prop);
-extern int __of_add_property_sysfs(struct device_node *np,
-		struct property *prop);
 extern int __of_remove_property(struct device_node *np, struct property *prop);
-extern void __of_remove_property_sysfs(struct device_node *np,
-		struct property *prop);
 extern int __of_update_property(struct device_node *np,
 		struct property *newprop, struct property **oldprop);
-extern void __of_update_property_sysfs(struct device_node *np,
-		struct property *newprop, struct property *oldprop);
 
-extern int __of_attach_node_sysfs(struct device_node *np);
 extern void __of_detach_node(struct device_node *np);
-extern void __of_detach_node_sysfs(struct device_node *np);
 
 extern void __of_sysfs_remove_bin_file(struct device_node *np,
 				       struct property *prop);