Remove outdated requirements file. Leave just ove file valid for

linux and windows

threads.py

@@ -12,8 +12,10 @@ from PyQt5.QtCore import QThread, pyqtSignal
 from constants import Constants, Database, ChecksumWhat
 from utilities import checksum_ok
 
+# Needed for pyinstaller compilation.
 import encodings.idna
 
+
 class ThreadStatus(Enum):
     """Possible thread status."""