sysctl: kill dead ctl_handler definitions.

When removing the sysctl strategy routines I overlooked their definitions
in sysctl.h.    So remove those unnecessary definitions now.
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>

include/linux/sysctl.h

@@ -972,10 +972,6 @@ extern int sysctl_perm(struct ctl_table_root *root,
 
 typedef struct ctl_table ctl_table;
 
-typedef int ctl_handler (struct ctl_table *table,
-			 void __user *oldval, size_t __user *oldlenp,
-			 void __user *newval, size_t newlen);
-
 typedef int proc_handler (struct ctl_table *ctl, int write,
 			  void __user *buffer, size_t *lenp, loff_t *ppos);
 
@@ -996,13 +992,6 @@ extern int proc_doulongvec_minmax(struct ctl_table *, int,
 extern int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int,
 				      void __user *, size_t *, loff_t *);
 
-extern ctl_handler sysctl_data;
-extern ctl_handler sysctl_string;
-extern ctl_handler sysctl_intvec;
-extern ctl_handler sysctl_jiffies;
-extern ctl_handler sysctl_ms_jiffies;
-
-
 /*
  * Register a set of sysctl names by calling register_sysctl_table
  * with an initialised array of struct ctl_table's.  An entry with