ftrace: Remove unused extern declarations

commit 6a9c981 ("ftrace: Remove unused function ftrace_arch_read_dyn_info()")
left ftrace_arch_read_dyn_info() extern declaration.
And commit 1d74f2a ("ftrace: remove ftrace_ip_converted()")
leave ftrace_ip_converted() declaration.

Link: https://lore.kernel.org/linux-trace-kernel/[email protected]

Cc: <[email protected]>
Cc: <[email protected]>
Signed-off-by: YueHaibing <[email protected]>
Signed-off-by: Steven Rostedt (Google) <[email protected]>

Author: YueHaibing

include/linux/ftrace.h

@@ -684,7 +684,6 @@ void __init
 ftrace_set_early_filter(struct ftrace_ops *ops, char *buf, int enable);
 
 /* defined in arch */
-extern int ftrace_ip_converted(unsigned long ip);
 extern int ftrace_dyn_arch_init(void);
 extern void ftrace_replace_code(int enable);
 extern int ftrace_update_ftrace_func(ftrace_func_t func);
@@ -859,9 +858,6 @@ static inline int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_a
 }
 #endif
 
-/* May be defined in arch */
-extern int ftrace_arch_read_dyn_info(char *buf, int size);
-
 extern int skip_trace(unsigned long ip);
 extern void ftrace_module_init(struct module *mod);
 extern void ftrace_module_enable(struct module *mod);