Merge branch 'rs/commit-h-single-parent-cleanup'

Code clean-up.

* rs/commit-h-single-parent-cleanup:
commit: remove unused inline function single_parent()

diff --combined commit.h
index 6d857f06c16c0dfc3a447355d9a185b416e4e664,f3805fec6b3a5853316d1476619adc5410224a7e..1283d2a51fdab6d63c75bcdf62adfef3bd2564ba
--- 1/commit.h
--- 2/commit.h
+++ b/commit.h
@@@ -249,7 -249,7 +249,7 @@@ typedef int (*each_commit_graft_fn)(con
  
  struct commit_graft *read_graft_line(char *buf, int len);
  int register_commit_graft(struct commit_graft *, int);
 -struct commit_graft *lookup_commit_graft(const unsigned char *sha1);
 +struct commit_graft *lookup_commit_graft(const struct object_id *oid);
  
  extern struct commit_list *get_merge_bases(struct commit *rev1, struct commit *rev2);
  extern struct commit_list *get_merge_bases_many(struct commit *one, int n, struct commit **twos);
@@@ -313,11 -313,6 +313,6 @@@ extern int interactive_add(int argc, co
  extern int run_add_interactive(const char *revision, const char *patch_mode,
                               const struct pathspec *pathspec);
  
- static inline int single_parent(struct commit *commit)
- {
-       return commit->parents && !commit->parents->next;
- }
- 
  struct commit_list *reduce_heads(struct commit_list *heads);
  
  struct commit_extra_header {