nfsd: remove nfs4_reset_lease() declarations

The function was removed a long time ago, but the declaration
and a dummy implementation are still there, referencing the
deprecated time_t type.

Remove both.

Fixes: f958a132 ("nfsd4: remove unnecessary lease-setting function")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfsd/nfsd.h

@@ -143,7 +143,6 @@ int nfs4_state_start(void);
 int nfs4_state_start_net(struct net *net);
 void nfs4_state_shutdown(void);
 void nfs4_state_shutdown_net(struct net *net);
-void nfs4_reset_lease(time_t leasetime);
 int nfs4_reset_recoverydir(char *recdir);
 char * nfs4_recoverydir(void);
 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
@@ -154,7 +153,6 @@ static inline int nfs4_state_start(void) { return 0; }
 static inline int nfs4_state_start_net(struct net *net) { return 0; }
 static inline void nfs4_state_shutdown(void) { }
 static inline void nfs4_state_shutdown_net(struct net *net) { }
-static inline void nfs4_reset_lease(time_t leasetime) { }
 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
 static inline char * nfs4_recoverydir(void) {return NULL; }
 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)