Fix green line sometimes occurring on the GIF (#278)

Gifski/Gifski.swift

@@ -295,10 +295,7 @@ final class Gifski {
 		generator.requestedTimeToleranceBefore = .zero
 		generator.requestedTimeToleranceAfter = .zero
 
-		// This improves the performance a little bit.
-		if let dimensions = conversion.dimensions {
-			generator.maximumSize = CGSize(widthHeight: dimensions.longestSide)
-		}
+		// We are intentionally not setting a `generator.maximumSize` as it's buggy: https://github.com/sindresorhus/Gifski/pull/278
 
 		// Even though we enforce a minimum of 3 FPS in the GUI, a source video could have lower FPS, and we should allow that.
 		var fps = (conversion.frameRate.map(Double.init) ?? assetFrameRate).clamped(to: 0.1...Constants.allowedFrameRate.upperBound)