Delete ehcache-2.10.3.jar

o2server/commons/ext/ehcache-2.10.3.jar

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:61954bb0c48d49cf1df4a3c3fa1bb42c95bebcf5c3e0be6548a26bb063b3c726
-size 8910167