Avoid char[] allocation for new String(byte[], ISO_8859_1)

Bug: 247773125
Test: atest CtsLibcoreTestCases
Change-Id: Ie9879e93bc06c1893ee000fb97fec92b04937562
diff --git a/runtime/native/libcore_util_CharsetUtils.cc b/runtime/native/libcore_util_CharsetUtils.cc
index 92f355e..c53fd6e 100644
--- a/runtime/native/libcore_util_CharsetUtils.cc
+++ b/runtime/native/libcore_util_CharsetUtils.cc
@@ -50,24 +50,6 @@
   }
 }
 
-static void CharsetUtils_isoLatin1BytesToChars(JNIEnv* env, jclass, jbyteArray javaBytes,
-                                               jint offset, jint length, jcharArray javaChars) {
-  ScopedByteArrayRO bytes(env, javaBytes);
-  if (bytes.get() == nullptr) {
-    return;
-  }
-  ScopedCharArrayRW chars(env, javaChars);
-  if (chars.get() == nullptr) {
-    return;
-  }
-
-  const jbyte* src = &bytes[offset];
-  jchar* dst = &chars[0];
-  for (int i = length - 1; i >= 0; --i) {
-    *dst++ = static_cast<jchar>(*src++ & 0xff);
-  }
-}
-
 /**
  * Translates the given characters to US-ASCII or ISO-8859-1 bytes, using the fact that
  * Unicode code points between U+0000 and U+007f inclusive are identical to US-ASCII, while
@@ -157,7 +139,6 @@
 
 static JNINativeMethod gMethods[] = {
   FAST_NATIVE_METHOD(CharsetUtils, asciiBytesToChars, "([BII[C)V"),
-  FAST_NATIVE_METHOD(CharsetUtils, isoLatin1BytesToChars, "([BII[C)V"),
   FAST_NATIVE_METHOD(CharsetUtils, toAsciiBytes, "(Ljava/lang/String;II)[B"),
   FAST_NATIVE_METHOD(CharsetUtils, toIsoLatin1Bytes, "(Ljava/lang/String;II)[B"),
   FAST_NATIVE_METHOD(CharsetUtils, toUtf8Bytes, "(Ljava/lang/String;II)[B"),