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

["Martin Ågren" <martin.agren@gmail.com>]

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 */
 
 /*
-- 
2.34.1.703.g22d0c6ccf7