tunables: remove support for s64 tunables

Nothing uses them now.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Alexander Motin <[email protected]>
Reviewed-by: Pavel Snajdr <[email protected]>
Signed-off-by: Rob Norris <[email protected]>
Closes openzfs#17377

Author: robn

include/os/linux/kernel/linux/mod_compat.h

@@ -79,7 +79,7 @@ enum scope_prefix_types {
 };
 
 /*
- * While we define our own s64/u64 types, there is no reason to reimplement the
+ * While we define our own u64 types, there is no reason to reimplement the
  * existing Linux kernel types, so we use the preprocessor to remap our
  * "custom" implementations to the kernel ones. This is done because the CPP
  * does not allow us to write conditional definitions. The fourth definition
@@ -112,11 +112,6 @@ enum scope_prefix_types {
 #define	spl_param_ops_charp param_ops_charp
 #define	spl_param_ops_STRING param_ops_charp
 
-int spl_param_set_s64(const char *val, zfs_kernel_param_t *kp);
-extern int spl_param_get_s64(char *buffer, zfs_kernel_param_t *kp);
-extern const struct kernel_param_ops spl_param_ops_s64;
-#define	spl_param_ops_S64 spl_param_ops_s64
-
 extern int spl_param_set_u64(const char *val, zfs_kernel_param_t *kp);
 extern int spl_param_get_u64(char *buffer, zfs_kernel_param_t *kp);
 extern const struct kernel_param_ops spl_param_ops_u64;

module/os/linux/spl/spl-generic.c

@@ -575,7 +575,6 @@ EXPORT_SYMBOL(spl_param_get_##type);					\
 EXPORT_SYMBOL(spl_param_set_##type);					\
 EXPORT_SYMBOL(spl_param_ops_##type);
 
-define_spl_param(s64, "%lld")
 define_spl_param(u64, "%llu")
 
 /*