[CANCEL][VOTE] Release Apache Uniffle (Incubating) 0.7.0-rc1

[Junfan Zhang]

Hello Uniffle community

       I'm canceling the vote
https://lists.apache.org/thread/7tgymwd37skvr5o3v875slzsrlntfsjw

       Thanks Kaijie Chen and He Qi's suggestion. I'll fix them in the next
version of 0.7.0-rc2.

       Thanks a lot for your help