doc: clean up fee-recommendation.md for 1.14.6

Removes the note that dust recommendations are done in a future
release, as 1.14.6 is that future release

doc/fee-recommendation.md

@@ -1,7 +1,7 @@
 Dogecoin Fee Recommendation
 ----------------------------
 
-_last updated for 1.14.5_
+_last updated for 1.14.6_
 
 The Dogecoin chain has a relatively low block interval, 1 megabyte blockspace
 and aims to provide a cheap means for people to transact. Therefore, the biggest
@@ -21,12 +21,8 @@ wallet, are:
 The wallet rejects transactions that have outputs under the dust limit, and
 discards change to fee if it falls under this limit.
 
-Note: The recommended dust limit is expected to be lowered in a follow-up
-      release, once enough miners and relay nodes have adopted newly introduced
-      relay dust limits touched upon below.
-
 Note: In the past, Dogecoin has enforced a rounding function in the fee
-      mechanism. As of version 1.14.5, this is no longer the case, and fees are
+      mechanism. Since version 1.14.5, this is no longer the case, and fees are
       calculated over the exact size of a transaction. For example, a 192 byte
       transaction only has to pay `0.01 / 1000 * 192 = 0.00192` DOGE fee.