refactor: update SCSS syntax & remove open-color dep (#10633)

packages/common/src/utils.ts

@@ -10,7 +10,6 @@ import type {
   Zoom,
 } from "@excalidraw/excalidraw/types";
 
-import { tinycolor } from "./colors";
 import {
   DEFAULT_VERSION,
   ENV,
@@ -548,10 +547,6 @@ export const mapFind = <T, K>(
   return undefined;
 };
 
-export const isTransparent = (color: string) => {
-  return tinycolor(color).getAlpha() === 0;
-};
-
 export type ResolvablePromise<T> = Promise<T> & {
   resolve: [T] extends [undefined]
     ? (value?: MaybePromise<Awaited<T>>) => void