Issue removing Node from cluster?

Hi,
I was wondering if someone could lend me hand. Im trying to remove the node from cluster which i did then i try to delete /etc/pve/nodes/nodename but im getting permission denied not sure why

now im getting activity blocked

im scared to death to reboot the server because it might not turn on the vms

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root@prometheus:~# pvecm status
Quorum information
------------------
Date:             Wed Dec  5 18:53:23 2018
Quorum provider:  corosync_votequorum
Nodes:            1
Node ID:          0x00000001
Ring ID:          1/52
Quorate:          No

Votequorum information
----------------------
Expected votes:   2
Highest expected: 2
Total votes:      1
Quorum:           2 Activity blocked
Flags:

Membership information
----------------------
    Nodeid      Votes Name
0x00000001          1 192.168.3.252 (local)

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