beps: update BEP process to merge straight into implementable

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

beps/NNNN-template/README.md

@@ -1,6 +1,6 @@
 ---
 title: BEP Title
-status: provisional
+status: implementable
 authors:
   - '@ghost'
 owners:
@@ -13,16 +13,10 @@ creation-date: yyyy-mm-dd
 
 <!--
 **Note:** When your BEP is complete, all these pre-existing comments should be removed
-
-When editing BEPs, aim for tightly-scoped, single-topic PRs to keep discussions focused. If you disagree with what is already in a document, open a new PR with suggested changes.
 -->
 
 # BEP: <!-- Your short, descriptive title -->
 
-<!-- Before merging the initial BEP PR, create a feature issue and update the below link. You can wait with this step until the BEP is ready to be merged. -->
-
-[**Discussion Issue**](https://github.com/backstage/backstage/issues/NNNNN)
-
 - [Summary](#summary)
 - [Motivation](#motivation)
   - [Goals](#goals)