Stop validating that --event-time-start is before "current" time

In the next commit we'll be adding a validation that requires that `--event-time-start`
and `--event-time-end` are mutually required. That is, whenever one is specified,
the other is required. In that world, `--event-time-start` will never need to be compared
against the "current" time, because it'll never be run in conjunction with the "current"
time.

core/dbt/cli/flags.py

@@ -7,7 +7,6 @@
 from pprint import pformat as pf
 from typing import Any, Callable, Dict, List, Optional, Set, Union
 
-import pytz
 from click import Context, Parameter, get_current_context
 from click.core import Command as ClickCommand
 from click.core import Group, ParameterSource
@@ -367,13 +366,6 @@ def _validate_event_time_configs(self) -> None:
                 raise DbtUsageException(
                     "Value for `--event-time-start` must be less than `--event-time-end`"
                 )
-        elif event_time_start is not None:
-            utc_start = event_time_start.replace(tzinfo=pytz.UTC)
-            current_time = datetime.now(pytz.UTC)
-            if utc_start >= current_time:
-                raise DbtUsageException(
-                    f"Value for `--event-time-start` ({utc_start}) must be less than the current time ({current_time}) if `--event-time-end` is not specififed"
-                )
 
     def fire_deprecations(self):
         """Fires events for deprecated env_var usage."""

tests/functional/cli/test_option_interaction_validations.py

@@ -1,7 +1,4 @@
-from datetime import datetime
-
 import pytest
-from freezegun import freeze_time
 
 from dbt.tests.util import run_dbt
 
@@ -32,21 +29,3 @@ def test_option_combo(self, project, event_time_start, event_time_end, expect_pa
                 in e.__str__()
             )
             assert not expect_pass
-
-
-class TestEventTimeStartCurrent_time:
-    @pytest.mark.parametrize(
-        "event_time_start,current_time,expect_pass",
-        [
-            ("2024-10-01", "2024-10-02", True),
-            ("2024-10-02", "2024-10-01", False),
-        ],
-    )
-    def test_option_combo(self, project, event_time_start, current_time, expect_pass):
-        with freeze_time(datetime.fromisoformat(current_time)):
-            try:
-                run_dbt(["build", "--event-time-start", event_time_start])
-                assert expect_pass
-            except Exception as e:
-                assert "must be less than the current time" in e.__str__()
-                assert not expect_pass