Drop files from .gitignore

tests/py/AnalogIO_AnalogDiscovery2_Power.py

tests/py/AnalogIO_AnalogDiscovery2_SystemMonitor.py

tests/py/AnalogIO_AnalogDiscovery_Power.py

tests/py/AnalogIO_AnalogDiscovery_SystemMonitor.py

tests/py/AnalogIO_DigitalDiscovery.py

tests/py/AnalogIO_ElectronicsExplorer.py

tests/py/AnalogImpedance_Analyzer.py

tests/py/AnalogImpedance_Compensation.py

tests/py/AnalogImpedance_Input.py

tests/py/AnalogImpedance_Meter.py

tests/py/AnalogImpedance_ThinkSpeak.py

tests/py/AnalogInDigitalIn_Acquisition.py

tests/py/AnalogIn_Acquisition.py

tests/py/AnalogIn_Logger.py

tests/py/AnalogIn_Record.py

tests/py/AnalogIn_Record_Trigger.py

tests/py/AnalogIn_Record_Trigger_int16.py

tests/py/AnalogIn_Record_Wave_Mono.py

tests/py/AnalogIn_Record_int16.py

tests/py/AnalogIn_Sample.py