patch 9.0.0180: stray logfile appears when running tests

Problem:    Stray logfile appears when running tests.
Solution:   Remove ch_logfile() calls.
diff --git a/src/testdir/test_textprop.vim b/src/testdir/test_textprop.vim
index f60eb83..4f03ef5 100644
--- a/src/testdir/test_textprop.vim
+++ b/src/testdir/test_textprop.vim
@@ -974,12 +974,10 @@
   call assert_equal(1489, line2byte(400))
   bwipe!
 
-call ch_logfile('logfile', 'w')
   " Add many lines so that the data block is split.
   " With and without props should give the same result.
   call Run_test_with_line2byte(0)
   call Run_test_with_line2byte(1)
-call ch_logfile('', 'w')
 
   call prop_type_delete('comment')
 endfunc
diff --git a/src/version.c b/src/version.c
index 895c4e0..a7d3d07 100644
--- a/src/version.c
+++ b/src/version.c
@@ -736,6 +736,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    180,
+/**/
     179,
 /**/
     178,