many tmpfs

Dear All,

After Install RHEL 7 have many tmpfs (6 tmpfs filesystem), these tmpfs mandatory for OS ,If not required we can unmount tmpfs?

File system look like after installation

devtmpfs 32G 0 32G 0% /dev
tmpfs 32G 88K 32G 1% /dev/shm
tmpfs 32G 9.7M 32G 1% /run
tmpfs 32G 0 32G 0% /sys/fs/cgroup