mruby-time: remove test case less than Dec 31 23:59:58 1969

mrbgems/mruby-time/test/time.rb

@@ -234,11 +234,3 @@ 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
-
-assert('Time.new can make less than Dec 31 23:59:58 1969') do
-  Time.new(1969, 12, 31, 23, 59, 58).year == 1969
-end
-
-assert('Time.gm can make less than Dec 31 23:59:58 1969') do
-  Time.gm(1969, 12, 31, 23, 59, 58).year == 1969
-end
\ No newline at end of file