remove unused import

packages/backend/src/core/FileInfoService.ts

@@ -14,7 +14,6 @@ import FFmpeg from 'fluent-ffmpeg';
 import isSvg from 'is-svg';
 import probeImageSize from 'probe-image-size';
 import { type predictionType } from 'nsfwjs';
-import sharp from 'sharp';
 import { sharpBmp } from '@misskey-dev/sharp-read-bmp';
 import { encode } from 'blurhash';
 import { createTempDir } from '@/misc/create-temp.js';
@@ -22,7 +21,6 @@ import { AiService } from '@/core/AiService.js';
 import { LoggerService } from '@/core/LoggerService.js';
 import type Logger from '@/logger.js';
 import { bindThis } from '@/decorators.js';
-import { sub } from 'date-fns';
 
 export type FileInfo = {
 	size: number;