sample-lnd.conf: remove noencryptwallet flag from sample

sample-lnd.conf

@@ -133,11 +133,6 @@
 ; network.
 ; nobootstrap=1
 
-; If set, your wallet will be encrypted with the default passphrase. This isn't
-; recommend, as if an attacker gains access to your wallet file, they'll be able
-; to decrypt it. This value is ONLY to be used in testing environments.
-; noencryptwallet=1
-
 ; The alias your node will use, which can be up to 32 UTF-8 characters in
 ; length.
 ; alias=My Lightning ☇