Remove monotonic_time_coarse datetime helper (#104892)

homeassistant/util/dt.py

@@ -5,9 +5,7 @@ import bisect
 from contextlib import suppress
 import datetime as dt
 from functools import partial
-import platform
 import re
-import time
 from typing import Any
 import zoneinfo
 
@@ -16,7 +14,6 @@ import ciso8601
 DATE_STR_FORMAT = "%Y-%m-%d"
 UTC = dt.UTC
 DEFAULT_TIME_ZONE: dt.tzinfo = dt.UTC
-CLOCK_MONOTONIC_COARSE = 6
 
 # EPOCHORDINAL is not exposed as a constant
 # https://github.com/python/cpython/blob/3.10/Lib/zoneinfo/_zoneinfo.py#L12
@@ -476,29 +473,3 @@ def _datetime_ambiguous(dattim: dt.datetime) -> bool:
     assert dattim.tzinfo is not None
     opposite_fold = dattim.replace(fold=not dattim.fold)
     return _datetime_exists(dattim) and dattim.utcoffset() != opposite_fold.utcoffset()
-
-
-def __gen_monotonic_time_coarse() -> partial[float]:
-    """Return a function that provides monotonic time in seconds.
-
-    This is the coarse version of time_monotonic, which is faster but less accurate.
-
-    Since many arm64 and 32-bit platforms don't support VDSO with time.monotonic
-    because of errata, we can't rely on the kernel to provide a fast
-    monotonic time.
-
-    https://lore.kernel.org/lkml/20170404171826.25030-1-marc.zyngier@arm.com/
-    """
-    # We use a partial here since its implementation is in native code
-    # which allows us to avoid the overhead of the global lookup
-    # of CLOCK_MONOTONIC_COARSE.
-    return partial(time.clock_gettime, CLOCK_MONOTONIC_COARSE)
-
-
-monotonic_time_coarse = time.monotonic
-with suppress(Exception):
-    if (
-        platform.system() == "Linux"
-        and abs(time.monotonic() - __gen_monotonic_time_coarse()()) < 1
-    ):
-        monotonic_time_coarse = __gen_monotonic_time_coarse()

tests/util/test_dt.py

@@ -2,7 +2,6 @@
 from __future__ import annotations
 
 from datetime import UTC, datetime, timedelta
-import time
 
 import pytest
 
@@ -737,8 +736,3 @@ def test_find_next_time_expression_tenth_second_pattern_does_not_drift_entering_
         assert (next_target - prev_target).total_seconds() == 60
         assert next_target.second == 10
         prev_target = next_target
-
-
-def test_monotonic_time_coarse() -> None:
-    """Test monotonic time coarse."""
-    assert abs(time.monotonic() - dt_util.monotonic_time_coarse()) < 1