tweak doc

Signed-off-by: Terence Parr <parrt@antlr.org>

doc/releasing-antlr.md

@@ -9,7 +9,7 @@ Do this or make a PR:
 ```bash
 cd ~/antlr/code/antlr4
 git checkout master
-git merge master
+git merge dev
 ```
 
 ### Turn on DCO Enforcement
@@ -30,14 +30,6 @@ $ git push origin :refs/tags/4.10
 $ git push upstream :refs/tags/4.10
 ```
 
-### Create release candidate tag
-
-```bash
-$ git tag -a 4.10-rc.1 -m 'heading towards 4.10'
-$ git push origin 4.10-rc.1
-$ git push upstream 4.10-rc1
-```
-
 ### Go release tags
 
 It seems that [Go needs a `v` in the release git tag](https://go.dev/ref/mod#glos-version) so make sure that we double up with 4.10 and v4.10.
@@ -99,8 +91,6 @@ java -cp ":/Users/parrt/.m2/repository/org/antlr/antlr4/4.10-SNAPSHOT/antlr4-4.1
 
 ## Maven Repository Settings
 
-ugh. apparently you have to `mvn install` and then `mvn compile` or some such or subdir pom.xml's won't see the latest runtime build.
-
 First, make sure you have maven set up to communicate with staging servers etc...  Create file `~/.m2/settings.xml` with appropriate username/password for staging server and gpg.keyname/passphrase for signing. Make sure it has strict visibility privileges to just you. On unix, it looks like:
 
 ```bash