Get rid of Pitchfork.pipe

We no longer need it.

Author: byroot

lib/pitchfork.rb

@@ -120,25 +120,6 @@ def log_error(logger, prefix, exc)
       exc.backtrace.each { |line| logger.error(line) }
     end
 
-    F_SETPIPE_SZ = 1031 if RUBY_PLATFORM =~ /linux/
-
-    def pipe # :nodoc:
-      IO.pipe.each do |io|
-        # shrink pipes to minimize impact on /proc/sys/fs/pipe-user-pages-soft
-        # limits.
-        if defined?(F_SETPIPE_SZ)
-          begin
-            io.fcntl(F_SETPIPE_SZ, Raindrops::PAGE_SIZE)
-          rescue Errno::EINVAL
-            # old kernel
-          rescue Errno::EPERM
-            # resizes fail if Linux is close to the pipe limit for the user
-            # or if the user does not have permissions to resize
-          end
-        end
-      end
-    end
-
     def socketpair
       pair = UNIXSocket.socketpair(@socket_type).map { |s| MessageSocket.new(s) }
       pair[0].close_write

test/unit/test_util.rb

@@ -16,7 +16,7 @@ def test_socketpair
   end
 
   def test_pipe
-    r, w = Pitchfork.pipe
+    r, w = IO.pipe
     assert r
     assert w
 
@@ -45,7 +45,7 @@ def test_message_socket
     child, parent = Pitchfork.socketpair
     child_pid = fork do
       parent.sendmsg('just text')
-      read, write = Pitchfork.pipe
+      read, write = IO.pipe
       message = TestMessage.new('rich message', write)
       parent.sendmsg(message)
       write.close