remove support for webkit (#262)

Signed-off-by: xermicus <cyrill@parity.io>

js/playwright.config.js

@@ -35,11 +35,6 @@ module.exports = defineConfig({
       name: "firefox",
       use: { ...devices["Desktop Firefox"] },
     },
-
-    {
-      name: "webkit",
-      use: { ...devices["Desktop Safari"] },
-    },
   ],
 
   /* Run your local dev server before starting the tests */