pathspec: remove PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP

Since (ae8d08242 pathspec: pass directory indicator to
match_pathspec_item()) the path matching logic has been able to cope
with submodules without needing to strip off a trailing slash if a path
refers to a submodule.

Since stripping the slash is no longer necessary, remove the
PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP flag.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/rm.c

@@ -271,8 +271,7 @@ int cmd_rm(int argc, const char **argv, const char *prefix)
 		die(_("index file corrupt"));
 
 	parse_pathspec(&pathspec, 0,
-		       PATHSPEC_PREFER_CWD |
-		       PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
+		       PATHSPEC_PREFER_CWD,
 		       prefix, argv);
 	refresh_index(&the_index, REFRESH_QUIET, &pathspec, NULL, NULL);