message: remove unnecessary branches
diff: @@ -113,8 +113,6 @@ bool BaseCSVReader::TryCastValue(const Value &value, const LogicalType &sql_type
  auto width = DecimalType::GetWidth(sql_type);
  auto scale = DecimalType::GetScale(sql_type);
  switch (sql_type.InternalType()) {
  - case PhysicalType::INT8:
  - return TryCastDecimalOperator::Operation<TryCastToDecimalCommaSeparated, int8_t>(value_str, width, scale);
  case PhysicalType::INT16:
  return TryCastDecimalOperator::Operation<TryCastToDecimalCommaSeparated, int16_t>(value_str, width, scale);
  case PhysicalType::INT32:
  @@ -471,11 +469,6 @@ bool BaseCSVReader::Flush(DataChunk &insert_chunk, bool try_add_line) {
  auto scale = DecimalType::GetScale(return_types[col_idx]);
  switch (type_id) {
  - case PhysicalType::INT8:
  - success = TryCastDecimalVector<int8_t>(options, parse_chunk.data[col_idx],
  - insert_chunk.data[insert_idx], parse_chunk.size(),
  - error_message, width, scale, options.decimal_separator);
  - break;
  case PhysicalType::INT16:
  success = TryCastDecimalVector<int16_t>(options, parse_chunk.data[col_idx],
  insert_chunk.data[insert_idx], parse_chunk.size(),
  