whack-a-mole: kill strlen_user() (again)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/csky/include/asm/uaccess.h

@@ -397,8 +397,6 @@ long __strncpy_from_user(char *dst, const char *src, long count);
  */
 long strnlen_user(const char *src, long n);
 
-#define strlen_user(str) strnlen_user(str, 32767)
-
 struct exception_table_entry {
 	unsigned long insn;
 	unsigned long nextinsn;

arch/csky/lib/usercopy.c

@@ -116,7 +116,7 @@ long strncpy_from_user(char *dst, const char *src, long count)
 EXPORT_SYMBOL(strncpy_from_user);
 
 /*
- * strlen_user: - Get the size of a string in user space.
+ * strnlen_user: - Get the size of a string in user space.
  * @str: The string to measure.
  * @n:   The maximum valid length
  *

arch/nds32/include/asm/uaccess.h

@@ -260,7 +260,6 @@ do {									\
 
 extern unsigned long __arch_clear_user(void __user * addr, unsigned long n);
 extern long strncpy_from_user(char *dest, const char __user * src, long count);
-extern __must_check long strlen_user(const char __user * str);
 extern __must_check long strnlen_user(const char __user * str, long n);
 extern unsigned long __arch_copy_from_user(void *to, const void __user * from,
                                            unsigned long n);

arch/nios2/include/asm/uaccess.h

@@ -83,7 +83,6 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n);
 
 extern long strncpy_from_user(char *__to, const char __user *__from,
 			      long __len);
-extern __must_check long strlen_user(const char __user *str);
 extern __must_check long strnlen_user(const char __user *s, long n);
 
 /* Optimized macros */

arch/riscv/include/asm/uaccess.h

@@ -372,7 +372,6 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n)
 
 extern long strncpy_from_user(char *dest, const char __user *src, long count);
 
-extern long __must_check strlen_user(const char __user *str);
 extern long __must_check strnlen_user(const char __user *str, long n);
 
 extern