neomutt: remove patch which is no longer needed, possibly as a result of

changes to src/lib/libcurses. part of a diff from Jon Fineman.

mail/neomutt/patches/patch-auto_def

@@ -1,18 +0,0 @@
-Cope with some problem, possibly related to the old version of curses in OpenBSD
-
-Index: auto.def
---- auto.def.orig
-+++ auto.def
-@@ -754,9 +754,9 @@ cc-with [list -libs -L$ncurses_prefix/$::libdir_tail] 
-     user-error "Unable to find ncursesw library"
-   }
- 
--  foreach f {bkgrndset setcchar} {
--    cc-check-function-in-lib $f $ncurses_lib
--  }
-+#  foreach f {bkgrndset setcchar} {
-+#    cc-check-function-in-lib $f $ncurses_lib
-+#  }
- }
- 
- # Locate the directory containing ncurses.h