Revert "feat(encoding): support BOM detection (#5550)"

This reverts commit 5f66b4e729105286863a13955b1ed8897b45210e.

This caused test failures in text-encoder. cc @WingLim

1 files changed, 1 insertions, 23 deletions

diff --git a/test/js/web/encoding/text-decoder.test.js b/test/js/web/encoding/text-decoder.test.js
index 3685a5f6d..dabdb0936 100644
--- a/test/js/web/encoding/text-decoder.test.js
+++ b/test/js/web/encoding/text-decoder.test.js
@@ -250,7 +250,7 @@ describe("TextDecoder", () => {
   it("constructor should set values", () => {
     const decoder = new TextDecoder("utf-8", { fatal: true, ignoreBOM: false });
     expect(decoder.fatal).toBe(true);
-    expect(decoder.ignoreBOM).toBe(false);
+    // expect(decoder.ignoreBOM).toBe(false); // currently the getter for ignoreBOM doesn't work and always returns undefined
   });
 
   it("should throw on invalid input", () => {
@@ -265,28 +265,6 @@ describe("TextDecoder", () => {
   });
 });
 
-describe("TextDecoder ignoreBOM", () => {
-  it.each([
-    {
-      encoding: "utf-8",
-      bytes: [0xef, 0xbb, 0xbf, 0x61, 0x62, 0x63],
-    },
-    {
-      encoding: "utf-16le",
-      bytes: [0xff, 0xfe, 0x61, 0x00, 0x62, 0x00, 0x63, 0x00],
-    },
-  ])("should ignoreBOM for: %o", ({ encoding, bytes }) => {
-    const BOM = "\uFEFF";
-    const array = new Uint8Array(bytes);
-
-    const decoder_ignore_bom = new TextDecoder(encoding, { ignoreBOM: true });
-    expect(decoder_ignore_bom.decode(array)).toStrictEqual(`${BOM}abc`);
-
-    const decoder_not_ignore_bom = new TextDecoder(encoding, { ignoreBOM: false });
-    expect(decoder_not_ignore_bom.decode(array)).toStrictEqual("abc");
-  });
-});
-
 it("truncated sequences", () => {
   const assert_equals = (a, b) => expect(a).toBe(b);