removed unimplemented functions from cpp

Author: uzairnawaz

libc/src/__support/wchar/character_converter.cpp

@@ -23,8 +23,6 @@ bool CharacterConverter::isComplete() {
   return state->bytes_processed == state->total_bytes;
 }
 
-int CharacterConverter::push(char8_t utf8_byte) { return utf8_byte; }
-
 int CharacterConverter::push(char32_t utf32) {
   state->partial = utf32;
   state->bytes_processed = 0;
@@ -154,9 +152,5 @@ utf_ret<char8_t> CharacterConverter::pop_utf8() {
   return {.out = 0, .error = -1};
 }
 
-utf_ret<char32_t> CharacterConverter::pop_utf32() {
-  return {.out = 0, .error = -1};
-}
-
 } // namespace internal
 } // namespace LIBC_NAMESPACE_DECL