net: Space.h: Remove unused function declarations

Commit 5aa83a4c ("  [PATCH] remove two obsolete net drivers") remove fmv18x_probe().
And commmit 01f46857 ("eth: amd: remove NI6510 support (ni65)") leave ni65_probe().
Commit a10079c6 ("staging: remove hp100 driver") remove hp100 driver and hp100_probe()
declaration is not used anymore.

sonic_probe() and iph5526_probe() are never implemented since the beginning of git history.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20230802130716.37308-1-yuehaibing@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

include/net/Space.h

@@ -3,18 +3,11 @@
  * ethernet adaptor have the name "eth[0123...]".
  */
 
-struct net_device *hp100_probe(int unit);
 struct net_device *ultra_probe(int unit);
 struct net_device *wd_probe(int unit);
 struct net_device *ne_probe(int unit);
-struct net_device *fmv18x_probe(int unit);
-struct net_device *ni65_probe(int unit);
-struct net_device *sonic_probe(int unit);
 struct net_device *smc_init(int unit);
 struct net_device *cs89x0_probe(int unit);
 struct net_device *tc515_probe(int unit);
 struct net_device *lance_probe(int unit);
 struct net_device *cops_probe(int unit);
-
-/* Fibre Channel adapters */
-int iph5526_probe(struct net_device *dev);