[vte] build: Remove unncessary feature test

[Christian Persch <chpe src gnome org>]

commit b87c6f49ea0dda0c6bc7a274e389597af096718f
Author: Christian Persch <chpe src gnome org>
Date:   Sat Oct 12 20:10:55 2019 +0200

    build: Remove unncessary feature test
    
    getpgid() is in POSIX, so just depend on its presence.

 meson.build   | 2 --
 src/vte.cc    | 3 +--
 src/vtegtk.cc | 3 +--
 3 files changed, 2 insertions(+), 6 deletions(-)
---
diff --git a/meson.build b/meson.build
index d56334d6..a479f10f 100644
--- a/meson.build
+++ b/meson.build
@@ -183,8 +183,6 @@ foreach func: check_functions_required
 endforeach
 
 check_functions = [
-  # Misc PTY handling functions
-  'getpgid',
   # Misc I/O routines.
   'explicit_bzero',
   'pread',
diff --git a/src/vte.cc b/src/vte.cc
index abbead5a..6bd1cadd 100644
--- a/src/vte.cc
+++ b/src/vte.cc
@@ -10200,12 +10200,11 @@ Terminal::terminate_child() noexcept
        if (m_pty_pid == -1)
                 return false;
 
-#ifdef HAVE_GETPGID
         auto pgrp = getpgid(m_pty_pid);
         if (pgrp != -1) {
                 kill(-pgrp, SIGHUP);
         }
-#endif
+
         kill(m_pty_pid, SIGHUP);
         m_pty_pid = -1;
 
diff --git a/src/vtegtk.cc b/src/vtegtk.cc
index e3bff16b..be8db362 100644
--- a/src/vtegtk.cc
+++ b/src/vtegtk.cc
@@ -2755,13 +2755,12 @@ spawn_async_cb (GObject *source,
         if (terminal == nullptr) {
                 /* If the terminal was destroyed, we need to abort the child process, if any */
                 if (pid != -1) {
-#ifdef HAVE_GETPGID
                         pid_t pgrp;
                         pgrp = getpgid(pid);
                         if (pgrp != -1) {
                                 kill(-pgrp, SIGHUP);
                         }
-#endif
+
                         kill(pid, SIGHUP);
                 }
         }