patch 9.1.1057: Superfluous cleanup steps in test_ins_complete.vim

Problem:  Superfluous cleanup steps in test_ins_complete.vim.
Solution: Remove unnecessary :bw! and :autocmd! commands.
          Also remove unnecessary STRLEN() in insexpand.c
          (zeertzjq)

closes: #16542

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 836f0a8..edec15e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1057,
+/**/
     1056,
 /**/
     1055,