diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/user_manual/ocdoc b/user_manual/ocdoc
deleted file mode 160000
index 343496c792..0000000000
--- a/user_manual/ocdoc
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-Subproject commit 343496c792616459e8204b6614fd42a1b16a6d68