message: color.ts: rgba(): Remove unused polymorphic branch
diff: @@ -353,34 +353,13 @@ export function rgbToBlackWhiteString(rgbValue: Rgb, threshold: number): 'black'
  return rgbToGrayscale(rgbValue) >= threshold ? 'white' : 'black';
  }
  -function rgba(red: number, green: number, blue: number, alpha: number): Rgba;
  -function rgba(rgb: Rgb, alpha: number): Rgba;
  -function rgba(redOrRgb: number | Rgb, greenOrAlpha: number, blue?: number, alpha?: number): Rgba {
  - if (Array.isArray(redOrRgb)) {
  - // rgba(rgb: Rgb, alpha: number)
  - const res = redOrRgb;
  - alpha = greenOrAlpha;
  -
  +function rgba(rgb: Rgb, alpha: number): Rgba {
  return [
  - res[0],
  - res[1],
  - res[2],
  + rgb[0],
  + rgb[1],
  + rgb[2],
  normalizeAlphaComponent(alpha),
  ];
  - } else {
  - // rgba(red: number, green: number, blue: number, alpha: number)
  - const red = redOrRgb;
  - const green = greenOrAlpha;
  - blue = blue || 0;
  - alpha = alpha || 0;
  -
  - return [
  - normalizeColorComponent<RedComponent>(red),
  - normalizeColorComponent<GreenComponent>(green),
  - normalizeColorComponent<BlueComponent>(blue),
  - normalizeAlphaComponent(alpha),
  - ];
  - }
  }
  function rgbaToString(rgbaValue: Rgba): string {
  