bpf: lru: Remove unused declaration bpf_lru_promote()

Commit 3a08c2fd ("bpf: LRU List") declared but never implemented this.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20230808145531.19692-1-yuehaibing@huawei.comSigned-off-by: Martin KaFai Lau <martin.lau@kernel.org>

kernel/bpf/bpf_lru_list.h

@@ -75,6 +75,5 @@ void bpf_lru_populate(struct bpf_lru *lru, void *buf, u32 node_offset,
 void bpf_lru_destroy(struct bpf_lru *lru);
 struct bpf_lru_node *bpf_lru_pop_free(struct bpf_lru *lru, u32 hash);
 void bpf_lru_push_free(struct bpf_lru *lru, struct bpf_lru_node *node);
-void bpf_lru_promote(struct bpf_lru *lru, struct bpf_lru_node *node);
 
 #endif