Renamed classes.py into decrypted_accounts.py. Removed unnessesary elements from that file

src/account_checks.py

@@ -1,6 +1,6 @@
 import string
 
-from .classes import DecryptedAccount
+from .decrypted_account import DecryptedAccount
 
 FORBIDDEN_CHARS = frozenset("`\n")
 PUNCTUATION = frozenset(string.punctuation).difference(FORBIDDEN_CHARS)