patch 8.1.0884: double check for bsd systems

Problem:    Double check for bsd systems.
Solution:   Delete the old line.

src/testdir/test_functions.vim

@@ -1237,7 +1237,6 @@ func Test_platform_name()
   if has('unix') && executable('uname')
     let uname = system('uname')
     call assert_equal(uname =~? 'BeOS', has('beos'))
-    call assert_equal(uname =~? 'BSD\|DragonFly', has('bsd'))
     " GNU userland on BSD kernels (e.g., GNU/kFreeBSD) don't have BSD defined
     call assert_equal(uname =~? '\%(GNU/k\w\+\)\@<!BSD\|DragonFly', has('bsd'))
     call assert_equal(uname =~? 'HP-UX', has('hpux'))

src/version.c

@@ -783,6 +783,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    884,
 /**/
     883,
 /**/