fix: remove dead code

Author: d3vco

lib/image-reference.ts

@@ -165,12 +165,3 @@ export function isValidImageReference(reference: string): boolean {
     return false;
   }
 }
-
-// Regular Expression Source: OCI Image Spec V1
-// https://github.com/opencontainers/image-spec/blob/d60099175f88c47cd379c4738d158884749ed235/descriptor.md?plain=1#L143
-const digestIsValid = (digest: string) => /^sha256:[a-f0-9]{64}$/.test(digest);
-
-// Regular Expression Source: OCI Image Spec V1
-// https://github.com/opencontainers/distribution-spec/blob/3940529fe6c0a068290b27fb3cd797cf0528bed6/spec.md?plain=1#L160
-const tagIsValid = (tag: string) =>
-  /^[a-zA-Z0-9_][a-zA-Z0-9._-]{0,127}$/.test(tag);

lib/scan.ts

@@ -7,11 +7,7 @@ import { DockerFileAnalysis } from "./dockerfile/types";
 import { extractImageContent } from "./extractor";
 import { ImageName } from "./extractor/image";
 import { ExtractAction, ExtractionResult } from "./extractor/types";
-import {
-  isValidImageReference,
-  ParsedImageReference,
-  parseImageReference,
-} from "./image-reference";
+import { isValidImageReference, parseImageReference } from "./image-reference";
 import { fullImageSavePath } from "./image-save-path";
 import { getArchivePath, getImageType } from "./image-type";
 import { isNumber, isTrue } from "./option-utils";