Remove defaulting to test_data folder when no datadir is present

freqtrade/optimize/backtesting.py

@@ -407,7 +407,7 @@ class Backtesting(object):
         timerange = TimeRange.parse_timerange(None if self.config.get(
             'timerange') is None else str(self.config.get('timerange')))
         data = history.load_data(
-            datadir=Path(self.config['datadir']) if self.config.get('datadir') else None,
+            datadir=Path(self.config['datadir']),
             pairs=pairs,
             ticker_interval=self.ticker_interval,
             refresh_pairs=self.config.get('refresh_pairs', False),

freqtrade/optimize/hyperopt.py

@@ -349,7 +349,7 @@ class Hyperopt:
         timerange = TimeRange.parse_timerange(None if self.config.get(
             'timerange') is None else str(self.config.get('timerange')))
         data = load_data(
-            datadir=Path(self.config['datadir']) if self.config.get('datadir') else None,
+            datadir=Path(self.config['datadir']),
             pairs=self.config['exchange']['pair_whitelist'],
             ticker_interval=self.backtesting.ticker_interval,
             refresh_pairs=self.config.get('refresh_pairs', False),