net-im/telegram-desktop: fix build with GTK option (again)

Remove https://github.com/desktop-app/lib_webview/commit/48d70e5258754b2415b07c88f0376212596e09a7,
as it depends on function changes from https://github.com/desktop-app/lib_base/commit/1b949f5ca250a47cd1261dd27fd83c174665f8fb

Reported by: madpilot
Fixes: 80762637bb7d net-im/telegram-desktop: fix build with GTK option
Pointy hat to: vishwin
Approved by: Henry Hu <henry.hu.sh@gmail.com> (maintainer, implicit),

		arrowd (mentor, implicit), fluffy (mentor, implicit)

PR: 255719