Remove patches post dependency fixes

- lifts xfail from `test_monthly_freq`.
- removes patch in `helpers.resample` explained in
4a3e2de#diff-9bd6a7492809b04d13da665b8ae7d2fc75fae79930be1216fa77dc040fd2d3b1R381

src/market_prices/helpers.py

@@ -378,16 +378,6 @@ def resample(
 
     resampler = resample_me.resample(rule, closed="left", label="left", origin=origin)
     resampled = resampler.agg(agg_f)
-
-    # NOTE START... required for at least pandas 2.1.0.
-    # See https://github.com/pandas-dev/pandas/issues/55064
-    offset = pdutils.pdfreq_to_offset(rule) if isinstance(rule, str) else rule
-    first_index = data.index[0] if nominal_start is None else nominal_start
-    cut_off = first_index - offset
-    if resampled.index[0] <= cut_off:
-        resampled = resampled[resampled.index > cut_off]
-    # required for at least pandas 2.1.0. ...END
-
     resampled.columns = columns_
     resampled = volume_to_na(resampled)
     return resampled

tests/test_pt.py

@@ -2140,11 +2140,6 @@ def test_cbday_freq(self, daily_pt_ss, xnys):
             df.pt.downsample("3d", xnys),
         )
 
-    # TODO Remove xfail when pandas >2.2 released
-    # NB pd bug manifests in test, not package (manifests where takes a slice to
-    # evaluate 'subset').
-    # pandas issue ref is https://github.com/pandas-dev/pandas/issues/58604
-    @pytest.mark.xfail(reason="Known pd issue with py3.12, should resolve with pd>2.2")
     def test_monthly_freq(self, daily_pt, xnys, x247, one_day, symbols):
         """Verify "MS" and "QS" frequencies."""
         df = daily_pt