fgraph: Remove some unused functions

These functions are defined in the fgraph.c file, but not
called elsewhere, so delete these unused functions.

kernel/trace/fgraph.c:273:1: warning: unused function 'set_bitmap_bits'.
kernel/trace/fgraph.c:259:19: warning: unused function 'get_fgraph_type'.

Link: https://lore.kernel.org/linux-trace-kernel/20240606021053.27783-1-jiapeng.chong@linux.alibaba.com

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=9289
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

Author: wb-zjp846396

kernel/trace/fgraph.c

@@ -255,26 +255,13 @@ static inline int get_frame_offset(struct task_struct *t, int offset)
 	return __get_offset(t->ret_stack[offset]);
 }
 
-/* Get FGRAPH_TYPE from the word from the @offset at ret_stack */
-static inline int get_fgraph_type(struct task_struct *t, int offset)
-{
-	return __get_type(t->ret_stack[offset]);
-}
-
 /* For BITMAP type: get the bitmask from the @offset at ret_stack */
 static inline unsigned long
 get_bitmap_bits(struct task_struct *t, int offset)
 {
 	return (t->ret_stack[offset] >> FGRAPH_INDEX_SHIFT) & FGRAPH_INDEX_MASK;
 }
 
-/* For BITMAP type: set the bits in the bitmap bitmask at @offset on ret_stack */
-static inline void
-set_bitmap_bits(struct task_struct *t, int offset, unsigned long bitmap)
-{
-	t->ret_stack[offset] |= (bitmap << FGRAPH_INDEX_SHIFT);
-}
-
 /* Write the bitmap to the ret_stack at @offset (does index, offset and bitmask) */
 static inline void
 set_bitmap(struct task_struct *t, int offset, unsigned long bitmap)