removed cast; style

Author: uzairnawaz

libc/src/__support/wchar/character_converter.cpp

@@ -70,8 +70,8 @@ ErrorOr<char8_t> CharacterConverter::pop_utf8() {
   char32_t output;
 
   // Shift to get the next 6 bits from the utf32 encoding
-  const char32_t shift_amount =
-      static_cast<char32_t>((state->total_bytes - state->bytes_processed - 1) * ENCODED_BITS_PER_UTF8);
+  const size_t shift_amount =
+      (state->total_bytes - state->bytes_processed - 1) * ENCODED_BITS_PER_UTF8;
   if (state->bytes_processed == 0) {
     /*
       Choose the correct set of most significant bits to encode the length