diff --git a/LICENSE_ExtraCondition b/LICENSE_ExtraCondition
deleted file mode 100644
index e3156ff2..00000000
--- a/LICENSE_ExtraCondition
+++ /dev/null
@@ -1,6 +0,0 @@
-For any project which uses any source codes from this repo, the author(s) should ensure the project to satisfy one of the following conditions:
-1. Don't open source
-2. Open source under a non-GPL family license, and it is possible to 
-    a) redistribute the code of the project under Apache v2.0
-    b) merge the code of the project back (if there is any change to any source codes from this repo) to https://github.com/vczh-libraries under MS-PL or Apache v2.0
-3. Established an agreement with the author (https://github.com/vczh) of this repo