Remove duplicate asciidoc attributes from antora playbook

Author: fmbenhassine

spring-shell-docs/antora-playbook.yml

@@ -23,6 +23,9 @@ asciidoc:
     page-pagination: ''
     hide-uri-scheme: '@'
     tabs-sync-option: '@'
+    chomp: 'all'
+    attribute-missing: 'warn'
+    sourcemap: true
   extensions:
     - '@asciidoctor/tabs'
     - '@springio/asciidoctor-extensions'

spring-shell-docs/src/main/antora/resources/antora-resources/antora.yml

@@ -3,12 +3,5 @@ prerelease: ${antora-component.prerelease}
 
 asciidoc:
   attributes:
-    page-stackoverflow-url: https://stackoverflow.com/tags/spring-shell
-    page-pagination: ''
-    hide-uri-scheme: '@'
-    tabs-sync-option: '@'
-    chomp: 'all'
-    attribute-missing: 'warn'
     snippets: example$docs-src/test/java/org/springframework/shell/docs
     project-version: ${project.parent.version}
-    sourcemap: true