Update travis setting

repeatedly · repeatedly · commit fe59adc0ebbb · 2019-04-12T03:24:48.000+09:00
Signed-off-by: Masahiro Nakagawa &lt;repeatedly@gmail.com&gt;
diff --git a/.travis.yml b/.travis.yml
@@ -37,10 +37,7 @@ matrix:
   allow_failures:
     - rvm: 2.3.8
       os: linux
-    - rvm: 2.1.10
-      os: osx
-      osx_image: xcode8.3
-    - rvm: 2.4.1
+    - rvm: 2.4.6
       os: osx
       osx_image: xcode8.3
     - rvm: ruby-head
