remove border radius for opencollective spponsors (vuejs#359)

vuejs-jp-bot · kazupon · commit dfbd7de31c6f · 2017-09-30T01:03:42.000+09:00
diff --git a/themes/vue/source/css/_sponsor.styl b/themes/vue/source/css/_sponsor.styl
@@ -42,8 +42,6 @@
       width: auto
       max-width: 100px
       max-height: 60px
-    img
-      border-radius 50%
     h4
       color #999
       margin-bottom 0
