Revert "Merge branch 'interactive-rebase'"

Prepare for the current interactive-rebase patch thicket, backported to
`maint` (actually, our latest start of a merging rebase).

This reverts commit b358f8d, reversing
changes made to 9e699f5.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.gitignore

@@ -115,7 +115,6 @@
 /git-read-tree
 /git-rebase
 /git-rebase--am
-/git-rebase--helper
 /git-rebase--interactive
 /git-rebase--merge
 /git-receive-pack

Makefile

@@ -931,7 +931,6 @@ BUILTIN_OBJS += builtin/prune.o
 BUILTIN_OBJS += builtin/pull.o
 BUILTIN_OBJS += builtin/push.o
 BUILTIN_OBJS += builtin/read-tree.o
-BUILTIN_OBJS += builtin/rebase--helper.o
 BUILTIN_OBJS += builtin/receive-pack.o
 BUILTIN_OBJS += builtin/reflog.o
 BUILTIN_OBJS += builtin/remote.o

builtin.h

@@ -103,7 +103,6 @@ extern int cmd_prune_packed(int argc, const char **argv, const char *prefix);
 extern int cmd_pull(int argc, const char **argv, const char *prefix);
 extern int cmd_push(int argc, const char **argv, const char *prefix);
 extern int cmd_read_tree(int argc, const char **argv, const char *prefix);
-extern int cmd_rebase__helper(int argc, const char **argv, const char *prefix);
 extern int cmd_receive_pack(int argc, const char **argv, const char *prefix);
 extern int cmd_reflog(int argc, const char **argv, const char *prefix);
 extern int cmd_remote(int argc, const char **argv, const char *prefix);