Re: [PATCH] cache.h: drop duplicate `ensure_full_index()` declaration

> There are two identical declarations of `ensure_full_index()` in
> cache.h.
> 
> Commit 3964fc2aae ("sparse-index: add guard to ensure full index",
> 2021-03-30) provided an empty implementation of `ensure_full_index()`,
> declaring it in a new file sparse-index.h. When commit 4300f8442a
> ("sparse-index: implement ensure_full_index()", 2021-03-30) fleshed out
> the implementation, it added an identical declaration to cache.h.
> 
> Then 118a2e8bde ("cache: move ensure_full_index() to cache.h",
> 2021-04-01) favored having the declaration in cache.h. Because of the
> double declaration, at that point we could have just dropped the one in
> sparse-index.h, but instead it got moved to cache.h.
> 
> As a result, cache.h contains the exact same function declaration twice.
> Drop the one under "/* Name hashing */", in favor of the one under
> "/* Initialize and use the cache information */".
> 
> Signed-off-by: Martin Ågren <martin.agren@gmail.com>
> ---
>  cache.h | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/cache.h b/cache.h
> index 5d7463e6fb..281f00ab1b 100644
> --- a/cache.h
> +++ b/cache.h
> @@ -350,8 +350,6 @@ void add_name_hash(struct index_state *istate, struct cache_entry *ce);
>  void remove_name_hash(struct index_state *istate, struct cache_entry *ce);
>  void free_name_hash(struct index_state *istate);
>  
> -void ensure_full_index(struct index_state *istate);
> -
>  /* Cache entry creation and cleanup */
>  
>  /*