[MNEMONIC] remove entropy suggestions for DEWIF code

rfc/0014_Dubp_Mnemonic.md

@@ -62,12 +62,6 @@ It is recommended to encrypt the seed in [DEWIF] format.
 
 The password used to encrypt the seed must be sufficiently robust and preferably randomly generated.
 
-For a member account the password entropy should be at least `10^15`, which corresponds to 10 random alphanumeric characters.
-
-For a single wallet account, the minimum entropy must be `10^9`, which corresponds to 6 random alphanumeric characters.
-
-WARNING: The minimum entropy levels take into consideration the robustness of the [DEWIF] encryption format.
-
 [BIP39]: https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki#Wordlist
 [script]: https://tools.ietf.org/html/rfc7914.html
 [DEWIF]: https://git.duniter.org/nodes/common/doc/blob/dewif/rfc/0013_Duniter_Encrypted_Wallet_Import_Format.md