refactor

kernel/mem/usercopy.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MIT
 
-#include <kernel/bits/usercopy.h>
+#include <kernel/arch.h>
 #include <kernel/percpu.h>
 #include <kernel/usercopy.h>
 
@@ -11,7 +11,3 @@ bool usercopy_read(void* dst, const __user void* src, size_t len) {
 bool usercopy_write(__user void* dst, const void* src, size_t len) {
     return arch_usercopy_write(dst, src, len, &percpu_get()->sched.current->usercopy_region);
 }
-
-bool usercopy_strlen(const __user char* str, size_t max, size_t* len) {
-    return arch_usercopy_strlen(str, max, len, &percpu_get()->sched.current->usercopy_region);
-}