Delete zh-CN.yml

lib/paperclip/locales/zh-CN.yml

-en:
-  errors:
-    messages:
-      in_between: "必须介于%{min}和%{max}之间"
-      spoofed_media_type: "扩展名与内容不匹配"
-
-  number:
-    human:
-      storage_units:
-        format: "%n %u"
-        units:
-          byte:
-            one:   "Byte"
-            other: "Bytes"
-          kb: "KB"
-          mb: "MB"
-          gb: "GB"
-          tb: "TB"