Increase pylint score on test files

freqtrade/tests/optimize/test_backtesting.py

@@ -1,28 +1,19 @@
-# pragma pylint: disable=missing-docstring,W0212
+# pragma pylint: disable=missing-docstring, W0212, line-too-long, C0103
 
 import logging
 import math
-import pandas as pd
-import pytest
 from unittest.mock import MagicMock
+import pandas as pd
 from freqtrade import exchange, optimize
 from freqtrade.exchange import Bittrex
 from freqtrade.optimize import preprocess
 from freqtrade.optimize.backtesting import backtest, generate_text_table, get_timeframe
 import freqtrade.optimize.backtesting as backtesting
-from freqtrade.strategy.strategy import Strategy
 
 
-@pytest.fixture
-def default_strategy():
-    strategy = Strategy()
-    strategy.init({'strategy': 'default_strategy'})
-    return strategy
-
-
-def trim_dictlist(dl, num):
+def trim_dictlist(dict_list, num):
     new = {}
-    for pair, pair_data in dl.items():
+    for pair, pair_data in dict_list.items():
         new[pair] = pair_data[num:]
     return new