1. Delete some useless files 2. Add .gitignore file 3. Some function update Change-Id: Ie0b31dc20739fbceba20fd78f4fdfeaea4d526b2
1. Delete some useless files 2. Add .gitignore file 3. Some function update Change-Id: Ie0b31dc20739fbceba20fd78f4fdfeaea4d526b2