fit-test.js Remove duplicate test

[martinfrances107]

This is a really minor issue...

I can see that a test is duplicated

first instance at line line 19, then repeated a line 61

I will generate a PR which removes the version at line 61

it("projection.fitExtent(…) world equirectangular", () => {
  const projection = geoEquirectangular();
  projection.fitExtent([[50, 50], [950, 950]], world);
  assertInDelta(projection.scale(), 143.239449, 1e-6);
  assertInDelta(projection.translate(), [500, 492.000762], 1e-6);
});

[Fil]

closed by #258.