Remove redundant test in opentime (#712)

It looks like there was a duplicated block of code in the `test_seconds` test of `test_opentime`.  This PR removes that.

Author: KarthikRIyer

tests/test_opentime.py

@@ -555,14 +555,6 @@ def test_seconds(self):
         self.assertAlmostEqual(otio.opentime.to_seconds(t3), s3)
         self.assertAlmostEqual(otio.opentime.to_seconds(t4), s3)
 
-        v3 = 3459
-        r3 = 24
-        s3 = float(3459) / 24
-        t3 = otio.opentime.RationalTime(v3, r3)
-        t4 = otio.opentime.from_seconds(s3)
-        self.assertAlmostEqual(otio.opentime.to_seconds(t3), s3)
-        self.assertAlmostEqual(otio.opentime.to_seconds(t4), s3)
-
     def test_duration(self):
         start_time = otio.opentime.from_frames(100, 24)
         end = otio.opentime.from_frames(200, 24)