Removed an undeterministic subtest.
date-construct.js fails intermittently, because it expects that
two Date() calls return the same date string. But the second one
can be 1 second later. This subtest is undeterministic and already
covered by test262/es2015/test/built-ins/Date/S15.9.2.1_A2.js with
1 second epsilon.
JerryScript-DCO-1.0-Signed-off-by: Csaba Osztrogonác [email protected]