You can enable so they are visible only on L.ALT, not 100% hide.
For better "removal" you will have to take few seconds and manually edit playersPanel.xc
search for: "hpBarBg": { "hotKeyCode": 56, ... "hpBar": { "hotKeyCode": 56, ... "hp": { "hotKeyCode": 56, ...
option A: for each of them replace hotKeyCode (default 56=Lalt) to something less useful, for example 73 (Numpad9)
option B: for each of them add "enabled":false, at the beginning of the bracket (with 1space in front)
"hpBarBg": { "enabled": false, "hotKeyCode": ...
"hpBar": { "enabled": false, "hotKeyCode": ...
"hp": { "enabled": false, "hotKeyCode": ...
ps. wait for modpack to get update for today micro patch (at least xvm)