`Time.new(1969,12,31,23,59,59)` may or may not faile; ref #3932

On some platform and timezone it is a valid time spec.

mrbgems/mruby-time/test/time.rb

@@ -227,10 +227,6 @@ assert('2000 times 500us make a second') do
   t.usec == 0
 end
 
-assert('Time.new with Dec 31 23:59:59 1969 raise ArgumentError') do
-  assert_raise(ArgumentError) {Time.new(1969, 12, 31, 23, 59, 59)}
-end
-
 assert('Time.gm with Dec 31 23:59:59 1969 raise ArgumentError') do
   assert_raise(ArgumentError) {Time.gm(1969, 12, 31, 23, 59, 59)}
-end
\ No newline at end of file
+end