chore: remove link to fork since upstream added feature to link to fork

Author: anatawa12

packages/frontend/src/pages/about-misskey.vue

@@ -34,11 +34,6 @@ SPDX-License-Identifier: AGPL-3.0-only
 							{{ i18n.ts._aboutMisskey.source }} ({{ i18n.ts._aboutMisskey.original }})
 							<template #suffix>GitHub</template>
 						</FormLink>
-						<FormLink to="https://github.com/niri-la/misskey.niri.la" external>
-							<template #icon><i class="ti ti-code"></i></template>
-							{{ i18n.ts._aboutMisskey.forkSource }}
-							<template #suffix>GitHub</template>
-						</FormLink>
 						<FormLink to="https://crowdin.com/project/misskey" external>
 							<template #icon><i class="ti ti-language-hiragana"></i></template>
 							{{ i18n.ts._aboutMisskey.translation }}