https://git.ruby-lang.org/ruby.git/commit/?id=9da969cae7

From 9da969cae73b88a9e7acd761f184bd5275febdf7 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@g...>
Date: Mon, 15 Jul 2019 08:32:45 +0900
Subject: Revert "Dummy Makefile.in for CIs"

This reverts commit c55de95ff1c4ea6313c2863037703a0e5f0d0f4f.

Probably this is not needed for CI anymore.

diff --git a/Makefile.in b/Makefile.in
deleted file mode 100644
index 87cafdc..0000000
--- a/Makefile.in
+++ /dev/null
@@ -1 +0,0 @@
-# moved under template, remove after CIs succeed
-- 
cgit v0.10.2


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