Merge identical branches in TextEncoding::IsNonByteBasedEncoding.

They have been identical since UTF-32 support was removed three years
ago:
  https://chromium-review.googlesource.com/c/chromium/src/+/559995/

Bug: 417850
Change-Id: I9db2a9a8a94d18732e8c45caaaffc443ab387f71
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2401341
Auto-Submit: Jeremy Roman <jbroman@chromium.org>
Commit-Queue: Joshua Bell <jsbell@chromium.org>
Reviewed-by: Joshua Bell <jsbell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806417}

third_party/blink/renderer/platform/wtf/text/text_encoding.cc

@@ -82,11 +82,6 @@ bool TextEncoding::UsesVisualOrdering() const {
 }
 
 bool TextEncoding::IsNonByteBasedEncoding() const {
-  if (NoExtendedTextEncodingNameUsed()) {
-    return *this == UTF16LittleEndianEncoding() ||
-           *this == UTF16BigEndianEncoding();
-  }
-
   return *this == UTF16LittleEndianEncoding() ||
          *this == UTF16BigEndianEncoding();
 }