revision.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>

revision.h

@@ -230,7 +230,7 @@ struct rev_info {
 	struct revision_sources *sources;
 };
 
-extern int ref_excluded(struct string_list *, const char *path);
+int ref_excluded(struct string_list *, const char *path);
 void clear_ref_exclusion(struct string_list **);
 void add_ref_exclusion(struct string_list **, const char *exclude);
 
@@ -252,39 +252,39 @@ struct setup_revision_opt {
 	unsigned revarg_opt;
 };
 
-extern void init_revisions(struct rev_info *revs, const char *prefix);
-extern int setup_revisions(int argc, const char **argv, struct rev_info *revs,
-			   struct setup_revision_opt *);
-extern void parse_revision_opt(struct rev_info *revs, struct parse_opt_ctx_t *ctx,
-			       const struct option *options,
-			       const char * const usagestr[]);
+void init_revisions(struct rev_info *revs, const char *prefix);
+int setup_revisions(int argc, const char **argv, struct rev_info *revs,
+		    struct setup_revision_opt *);
+void parse_revision_opt(struct rev_info *revs, struct parse_opt_ctx_t *ctx,
+			const struct option *options,
+			const char * const usagestr[]);
 #define REVARG_CANNOT_BE_FILENAME 01
 #define REVARG_COMMITTISH 02
-extern int handle_revision_arg(const char *arg, struct rev_info *revs,
-			       int flags, unsigned revarg_opt);
+int handle_revision_arg(const char *arg, struct rev_info *revs,
+			int flags, unsigned revarg_opt);
 
-extern void reset_revision_walk(void);
-extern int prepare_revision_walk(struct rev_info *revs);
-extern struct commit *get_revision(struct rev_info *revs);
-extern char *get_revision_mark(const struct rev_info *revs,
-			       const struct commit *commit);
-extern void put_revision_mark(const struct rev_info *revs,
-			      const struct commit *commit);
+void reset_revision_walk(void);
+int prepare_revision_walk(struct rev_info *revs);
+struct commit *get_revision(struct rev_info *revs);
+char *get_revision_mark(const struct rev_info *revs,
+			const struct commit *commit);
+void put_revision_mark(const struct rev_info *revs,
+		       const struct commit *commit);
 
-extern void mark_parents_uninteresting(struct commit *commit);
-extern void mark_tree_uninteresting(struct tree *tree);
+void mark_parents_uninteresting(struct commit *commit);
+void mark_tree_uninteresting(struct tree *tree);
 
-extern void show_object_with_name(FILE *, struct object *, const char *);
+void show_object_with_name(FILE *, struct object *, const char *);
 
-extern void add_pending_object(struct rev_info *revs,
-			       struct object *obj, const char *name);
-extern void add_pending_oid(struct rev_info *revs,
-			    const char *name, const struct object_id *oid,
-			    unsigned int flags);
+void add_pending_object(struct rev_info *revs,
+			struct object *obj, const char *name);
+void add_pending_oid(struct rev_info *revs,
+		     const char *name, const struct object_id *oid,
+		     unsigned int flags);
 
-extern void add_head_to_pending(struct rev_info *);
-extern void add_reflogs_to_pending(struct rev_info *, unsigned int flags);
-extern void add_index_objects_to_pending(struct rev_info *, unsigned int flags);
+void add_head_to_pending(struct rev_info *);
+void add_reflogs_to_pending(struct rev_info *, unsigned int flags);
+void add_index_objects_to_pending(struct rev_info *, unsigned int flags);
 
 enum commit_action {
 	commit_ignore,
@@ -292,10 +292,10 @@ enum commit_action {
 	commit_error
 };
 
-extern enum commit_action get_commit_action(struct rev_info *revs,
-					    struct commit *commit);
-extern enum commit_action simplify_commit(struct rev_info *revs,
-					  struct commit *commit);
+enum commit_action get_commit_action(struct rev_info *revs,
+				     struct commit *commit);
+enum commit_action simplify_commit(struct rev_info *revs,
+				   struct commit *commit);
 
 enum rewrite_result {
 	rewrite_one_ok,
@@ -305,8 +305,9 @@ enum rewrite_result {
 
 typedef enum rewrite_result (*rewrite_parent_fn_t)(struct rev_info *revs, struct commit **pp);
 
-extern int rewrite_parents(struct rev_info *revs, struct commit *commit,
-	rewrite_parent_fn_t rewrite_parent);
+int rewrite_parents(struct rev_info *revs,
+		    struct commit *commit,
+		    rewrite_parent_fn_t rewrite_parent);
 
 /*
  * The log machinery saves the original parent list so that
@@ -317,6 +318,6 @@ extern int rewrite_parents(struct rev_info *revs, struct commit *commit,
  * get_saved_parents() will transparently return commit->parents if
  * history simplification is off.
  */
-extern struct commit_list *get_saved_parents(struct rev_info *revs, const struct commit *commit);
+struct commit_list *get_saved_parents(struct rev_info *revs, const struct commit *commit);
 
 #endif