Update readme.md

remove git-submodule from git.
shuaiZend · Nov 6, 2016 · 76034eb · 76034eb
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commit 76034eb
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diff --git a/readme.md b/readme.md
@@ -13,5 +13,4 @@
 ├── license.txt
 ├── package.json
 ├── readme.md
-└── ref-cdnjs              ... 来自 CDNJS 的开源库 (git-submodule)
 ```