[Bug] Party members not fully removed

MD version 1.1.1 Snapshot Paper 1.19.2 - 280

When a member of the party leaves or is kicked, their party member ID is removed, but they remain associated to the party/leader.

To test:

• create a party of 2 or more members
• have one member leave or kick them
• run the party variables in PAPI on the member that left and you get these results
• %md_party_size% = 1 (should be 0)
• %md_party_member_1]% = the previous leader (other player but should be NULL because they're no longer in a party)
• %md_party_member_2]% = NULL
• %md_party_leader% = the previous leader (should be NULL)
• Also, kicked member can not use party chat. It says they are not in the party.

In the attached image you can see I created a party scoreboard that shows both players in the same party that only has one party member because the other was kicked but they are still associated to the original party leader. [Legacy attachment omitted]