Revert "add GUNICORN_INHERIT_FDS environment variable support"

This reverts commit c9fcb25f51db9ae67f9585c93924e5af8b8bb8b8.

gunicorn/util.py

@@ -418,32 +418,11 @@ def daemonize():
 
         os.umask(0)
         maxfd = get_maxfd()
-
+        closerange(0, maxfd)
-        fds = []
-        if 'GUNICORN_INHERIT_FDS' in os.environ:
-            list_fds = os.environ['GUNICORN_INHERIT_FDS'].split(',')
-            try:
-                fds = [int(fd) for fd in list_fds]
-            except ValueError:
-                raise RuntimeError("Bad value in 'GUNICORN_INHERIT_FDS'")
-
-            for fd in range(0, max_fd):
-                if fd in fds:
-                    continue
-
-                try:
-                    os.close(fd)
-                except OSError:  # ERROR, fd wasn't open to begin with (ignored)
-                    pass
-        else:
-            closerange(0, maxfd)
 
         os.open(REDIRECT_TO, os.O_RDWR)
-        if 1 not in fds:
+        os.dup2(0, 1)
-            os.dup2(0, 1)
+        os.dup2(0, 2)
-
-        if 2 not in fds:
-            os.dup2(0, 2)
 
 
 def seed():