code: def test_drop_dst_boundary(self):
      # see gh-18031
      tz = "Europe/Brussels"
      freq = "15min"
  
      start = Timestamp("201710290100", tz=tz)
      end = Timestamp("201710290300", tz=tz)
      index = date_range(start=start, end=end, freq=freq)
  
      expected = DatetimeIndex(
          [
              "201710290115",
              "201710290130",
              "201710290145",
              "201710290200",
              "201710290215",
              "201710290230",
              "201710290245",
              "201710290200",
              "201710290215",
              "201710290230",
              "201710290245",
              "201710290300",
          ],
          dtype="M8[ns, Europe/Brussels]",
          freq=freq,
          ambiguous=[
              True,
              True,
              True,
              True,
              True,
              True,
              True,
              False,
              False,
              False,
              False,
              False,
          ],
      )
      result = index.drop(index[0])
      tm.assert_index_equal(result, expected)
  
imports: from datetime import datetime, timedelta, timezone, tzinfo
  from dateutil.tz import gettz
  import numpy
  import pytest
  import pytz
  from pandas._libs.tslibs import conversion, timezones
  import pandas
  from pandas import DatetimeIndex, Timestamp, bdate_range, date_range, isna, to_datetime
  import pandas._testing
label_desc: Use image node_id 3 for calling the TestDatetimeIndexTimezones obj's underlying member method code with example usage: obj.test_drop_dst_boundary() without return types