Remove call to User::getImplicitGroups() from ApiQueryAllUsers

Remove call to User::getImplicitGroups() from ApiQueryAllUsers

Per the below, as User::getGroupsWithPermission() will return */autoconfirmed, etc if applicable

> var_dump( User::getGroupsWithPermission( 'createtalk' ) );
array(2) {
  [0]=>
  string(1) "*"
  [1]=>
  string(4) "user"
}

> var_dump( User::getGroupsWithPermission( 'autoconfirmed' ) );
array(5) {
  [0]=>
  string(13) "autoconfirmed"
  [1]=>
  string(3) "bot"
  [2]=>
  string(5) "sysop"
  [3]=>
  string(8) "reviewer"
  [4]=>
  string(9) "confirmed"
}