[t/setting] delete an outdated test

t/setting/01-resizablepmcarray.t

@@ -5,7 +5,7 @@ pir::load_bytecode('nqp-setting.pbc');
 my @array := <0 1 2>;
 my @reversed := @array.reverse();
 
-plan(10);
+plan(9);
 
 ok( @reversed[0] == 2, 'First element correct');
 ok( @reversed[1] == 1, 'Second element correct');
@@ -14,8 +14,6 @@ ok( @reversed[2] == 0, 'Third element correct');
 my $join := @array.join('|');
 ok( $join eq '0|1|2', 'Join elements');
 
-ok( join(':', 'foo', 'bar', 'baz') eq 'foo:bar:baz', 'Join as standalone function');
-
 my @test := <apple banana cherry>;
 ok( @test.exists(2), 'Item exists at @test[2]' );
 ok( !@test.exists(3), 'Item does not exist at @test[3]');