Remove unnecessary type cast
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@@ -16,7 +16,6 @@ goog.require('ol.layer.Tile');
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goog.require('ol.math');
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goog.require('ol.renderer.webgl.Layer');
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goog.require('ol.renderer.webgl.tilelayer.shader');
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goog.require('ol.source.Tile');
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goog.require('ol.structs.Buffer');
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goog.require('ol.tilecoord');
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@@ -120,7 +119,6 @@ ol.renderer.webgl.TileLayer.prototype.prepareFrame =
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var tileLayer = this.getLayer();
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goog.asserts.assertInstanceof(tileLayer, ol.layer.Tile);
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var tileSource = tileLayer.getSource();
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goog.asserts.assertInstanceof(tileSource, ol.source.Tile);
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var tileGrid = tileSource.getTileGridForProjection(projection);
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var z = tileGrid.getZForResolution(viewState.resolution);
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var tileResolution = tileGrid.getResolution(z);
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