repository.h: drop extern from function declaration

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

repository.h

@@ -108,19 +108,16 @@ struct set_gitdir_args {
 	const char *alternate_db;
 };
 
-extern void repo_set_gitdir(struct repository *repo,
-			    const char *root,
-			    const struct set_gitdir_args *extra_args);
-extern void repo_set_worktree(struct repository *repo, const char *path);
-extern void repo_set_hash_algo(struct repository *repo, int algo);
-extern void initialize_the_repository(void);
-extern int repo_init(struct repository *r,
-		     const char *gitdir,
-		     const char *worktree);
-extern int repo_submodule_init(struct repository *submodule,
-			       struct repository *superproject,
-			       const char *path);
-extern void repo_clear(struct repository *repo);
+void repo_set_gitdir(struct repository *repo, const char *root,
+		     const struct set_gitdir_args *extra_args);
+void repo_set_worktree(struct repository *repo, const char *path);
+void repo_set_hash_algo(struct repository *repo, int algo);
+void initialize_the_repository(void);
+int repo_init(struct repository *r, const char *gitdir, const char *worktree);
+int repo_submodule_init(struct repository *submodule,
+			struct repository *superproject,
+			const char *path);
+void repo_clear(struct repository *repo);
 
 /*
  * Populates the repository's index from its index_file, an index struct will
@@ -130,6 +127,6 @@ extern void repo_clear(struct repository *repo);
  * than zero if an error occured.  If the repository's index has already been
  * populated then the number of entries will simply be returned.
  */
-extern int repo_read_index(struct repository *repo);
+int repo_read_index(struct repository *repo);
 
 #endif /* REPOSITORY_H */