chore: cleanup cloud RAD generation

Updating cloud rad generation to support [java-shared-config/pull/344](googleapis/java-shared-config#344) updates and removing inclusion of README as we're not currently supporting this feature yet

Source-Author: Emily Ball <emilyball@google.com>
Source-Date: Mon Nov 8 13:23:34 2021 -0800
Source-Repo: googleapis/synthtool
Source-Sha: 99ea92a109dbcd4e2b8c179e337848ba6a25fe16
Source-Link: googleapis/synthtool@99ea92a

Author: yoshi-automation

.kokoro/release/publish_javadoc11.sh

@@ -36,13 +36,9 @@ mvn clean install -B -q -DskipTests=true
 export NAME=google-cloud-gcloud-maven-plugin
 export VERSION=$(grep ${NAME}: versions.txt | cut -d: -f3)
 
-# V3 generates docfx yml from javadoc
-# generate yml
-mvn clean site -B -q -P docFX
-
-# copy README to docfx-yml dir and rename index.md
-cp README.md target/docfx-yml/index.md
-# copy CHANGELOG to docfx-yml dir and rename history.md
+# cloud RAD generation
+mvn clean javadoc:aggregate -B -q -P docFX
+# include CHANGELOG
 cp CHANGELOG.md target/docfx-yml/history.md
 
 pushd target/docfx-yml

synth.metadata

@@ -11,7 +11,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "717a6a1fe247df095092de1321eadc9da887a06c"
+        "sha": "99ea92a109dbcd4e2b8c179e337848ba6a25fe16"
       }
     }
   ],