Remove time_machine freeze from DLT tests

The freeze was causing a mismatch: the in-test yesterday_ds() call was
frozen but the one inside init_example_project() was not (likely a
pytest-xdist interaction). Both sides naturally agree on the date
without the freeze.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: eakmanrq <6326532+eakmanrq@users.noreply.github.com>

Author: eakmanrq

tests/cli/test_cli.py

@@ -878,7 +878,6 @@ def test_dlt_pipeline_errors(runner, tmp_path):
     assert "Error: Could not attach to pipeline" in result.output
 
 
-@time_machine.travel(FREEZE_TIME)
 def test_dlt_filesystem_pipeline(tmp_path):
     import dlt
 
@@ -982,7 +981,6 @@ def test_dlt_filesystem_pipeline(tmp_path):
         rmtree(storage_path)
 
 
-@time_machine.travel(FREEZE_TIME)
 def test_dlt_pipeline(runner, tmp_path):
     from dlt.common.pipeline import get_dlt_pipelines_dir