Drop KILL permission, just go with ADMIN

db/newsgroup.sql

@@ -43,8 +43,7 @@ create table server_permission (
 insert into server_permission values
     (1, 'READ'),
     (2, 'POST'),
-    (3, 'KILL'),
-    (4, 'ADMIN');
+    (3, 'ADMIN');
 
 create table server_user (
     id       INTEGER PRIMARY KEY NOT NULL,

lib/nntp/tiny/user.py

@@ -7,15 +7,13 @@ class UserPermission(enum.Flag):
     NONE  = 0
     READ  = 1
     POST  = enum.auto()
-    KILL  = enum.auto()
     ADMIN = enum.auto()
 
     def __str__(self):
         return {
             1: 'READ',
             2: 'POST',
-            3: 'KILL',
-            4: 'ADMIN'
+            3: 'ADMIN'
         }[self.value]
 
 class User(DatabaseTable):