diff --git a/IPython/frontend/html/notebook/static/codemirror2 b/IPython/frontend/html/notebook/static/codemirror2
deleted file mode 160000
index 3b731bb8c16..00000000000
--- a/IPython/frontend/html/notebook/static/codemirror2
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@@ -1 +0,0 @@
-Subproject commit 3b731bb8c16efc8cb82b9f28a9ed91428d71a703