don't fallback to exiftool for embedded image previews (#2747)

Given #2668 introduced support for imagemagick and libraw, this should no
longer be necessary which allow for reduced code footprint and complexity.

Fixes: #2744

server/src/domain/media/media.repository.ts

@@ -45,7 +45,6 @@ export interface TranscodeOptions {
 
 export interface IMediaRepository {
   // image
-  extractThumbnailFromExif(input: string, output: string): Promise<void>;
   resize(input: string | Buffer, output: string, options: ResizeOptions): Promise<void>;
   crop(input: string, options: CropOptions): Promise<Buffer>;