net: Remove __KERNEL__ cpp checks from include/net

These header files are never installed to user consumption, so any
__KERNEL__ cpp checks are superfluous.

Projects should also not copy these files into their userland utility
sources and try to use them there.  If they insist on doing so, the
onus is on them to sanitize the headers as needed.

Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/wimax.h

@@ -250,7 +250,6 @@
 
 #ifndef __NET__WIMAX_H__
 #define __NET__WIMAX_H__
-#ifdef __KERNEL__
 
 #include <linux/wimax.h>
 #include <net/genetlink.h>
@@ -518,8 +517,4 @@ extern ssize_t wimax_msg_len(struct sk_buff *);
 extern int wimax_rfkill(struct wimax_dev *, enum wimax_rf_state);
 extern int wimax_reset(struct wimax_dev *);
 
-#else
-/* You might be looking for linux/wimax.h */
-#error This file should not be included from user space.
-#endif /* #ifdef __KERNEL__ */
 #endif /* #ifndef __NET__WIMAX_H__ */