MAINT: Pass data_frequency to get_history_window

This allows us to remove the check for whether the provided dt had a
time of midnight, which was a flimsy way to infer if the data frequency
was 'daily'. Besides the explicit check being preferable, this method
was broken on the futures calendar, since midnight is a valid market
minute.

tests/test_api_shim.py

@@ -265,6 +265,7 @@ class TestAPIShim(WithCreateBarData,
                         5,
                         "1m",
                         "volume",
+                        "minute",
                         True
                     )
                 else:
@@ -274,6 +275,7 @@ class TestAPIShim(WithCreateBarData,
                         5,
                         "1m",
                         "volume",
+                        "minute",
                     )
 
         test_sim_params = SimulationParameters(