neovim: Remove patch merged upstream

packages/neovim/nvim-os-job.c.patch

@@ -1,14 +0,0 @@
-Submitted upstream at https://github.com/neovim/neovim/pull/2997
-
-diff -u -r ../neovim-master/src/nvim/os/job.c ./src/nvim/os/job.c
---- ../neovim-master/src/nvim/os/job.c	2015-07-10 16:11:13.000000000 -0400
-+++ ./src/nvim/os/job.c	2015-07-11 17:00:34.310021574 -0400
-@@ -445,7 +445,7 @@
-     return;
-   }
- 
--  if (WIFSTOPPED(stat) || WIFCONTINUED(stat)) {
-+  if (WIFSTOPPED(stat)) {
-     // Only care for processes that exited
-     return;
-   }