chore: delete unused util/color module (#27331)

packages/opencode/src/util/color.ts

@@ -1,19 +0,0 @@
-export function isValidHex(hex?: string): hex is string {
-  if (!hex) return false
-  return /^#[0-9a-fA-F]{6}$/.test(hex)
-}
-
-export function hexToRgb(hex: string): { r: number; g: number; b: number } {
-  const r = parseInt(hex.slice(1, 3), 16)
-  const g = parseInt(hex.slice(3, 5), 16)
-  const b = parseInt(hex.slice(5, 7), 16)
-  return { r, g, b }
-}
-
-export function hexToAnsiBold(hex?: string): string | undefined {
-  if (!isValidHex(hex)) return undefined
-  const { r, g, b } = hexToRgb(hex)
-  return `\x1b[38;2;${r};${g};${b}m\x1b[1m`
-}
-
-export * as Color from "./color"