tick/nohz: Remove unused tick_nohz_full_add_cpus_to()

This function isn't used anywhere. Remove it.

Signed-off-by: Alex Shi <alexs@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250410092423.9831-1-alexs@kernel.org

Author: Alex Shi

include/linux/tick.h

@@ -195,12 +195,6 @@ static inline bool tick_nohz_full_enabled(void)
 	__ret;								\
 })
 
-static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask)
-{
-	if (tick_nohz_full_enabled())
-		cpumask_or(mask, mask, tick_nohz_full_mask);
-}
-
 extern void tick_nohz_dep_set(enum tick_dep_bits bit);
 extern void tick_nohz_dep_clear(enum tick_dep_bits bit);
 extern void tick_nohz_dep_set_cpu(int cpu, enum tick_dep_bits bit);
@@ -281,7 +275,6 @@ extern void __init tick_nohz_full_setup(cpumask_var_t cpumask);
 #else
 static inline bool tick_nohz_full_enabled(void) { return false; }
 static inline bool tick_nohz_full_cpu(int cpu) { return false; }
-static inline void tick_nohz_full_add_cpus_to(struct cpumask *mask) { }
 
 static inline void tick_nohz_dep_set_cpu(int cpu, enum tick_dep_bits bit) { }
 static inline void tick_nohz_dep_clear_cpu(int cpu, enum tick_dep_bits bit) { }