Remove obsolete role attributes for tab groups in the reference manual

Since we now use asciidoctor-tabs instead of spring-asciidoctor-backends,
we no longer need the `role="primary"` and `role="secondary"` attributes
for tab groups.

Closes gh-33506

framework-docs/modules/ROOT/pages/data-access/orm/general.adoc

@@ -65,7 +65,7 @@ examples (one for Java configuration and one for XML configuration) show how to
 ======
 Java::
 +
-[source,java,indent=0,subs="verbatim,quotes",role="primary"]
+[source,java,indent=0,subs="verbatim,quotes"]
 ----
 	@Repository
 	public class ProductDaoImpl implements ProductDao {
@@ -77,7 +77,7 @@ Java::
 
 Kotlin::
 +
-[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
+[source,kotlin,indent=0,subs="verbatim,quotes"]
 ----
 	@Repository
 	class ProductDaoImpl : ProductDao {

framework-docs/modules/ROOT/pages/data-access/orm/hibernate.adoc

@@ -105,7 +105,7 @@ implementation resembles the following example, based on the plain Hibernate API
 ======
 Java::
 +
-[source,java,indent=0,subs="verbatim,quotes",role="primary"]
+[source,java,indent=0,subs="verbatim,quotes"]
 ----
 	public class ProductDaoImpl implements ProductDao {
 
@@ -126,7 +126,7 @@ Java::
 
 Kotlin::
 +
-[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
+[source,kotlin,indent=0,subs="verbatim,quotes"]
 ----
 	class ProductDaoImpl(private val sessionFactory: SessionFactory) : ProductDao {
 
@@ -208,7 +208,7 @@ these annotated methods. The following example shows how to do so:
 ======
 Java::
 +
-[source,java,indent=0,subs="verbatim,quotes",role="primary"]
+[source,java,indent=0,subs="verbatim,quotes"]
 ----
 	public class ProductServiceImpl implements ProductService {
 
@@ -233,7 +233,7 @@ Java::
 
 Kotlin::
 +
-[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
+[source,kotlin,indent=0,subs="verbatim,quotes"]
 ----
 	class ProductServiceImpl(private val productDao: ProductDao) : ProductService {
 
@@ -317,7 +317,7 @@ and an example for a business method implementation:
 ======
 Java::
 +
-[source,java,indent=0,subs="verbatim,quotes",role="primary"]
+[source,java,indent=0,subs="verbatim,quotes"]
 ----
 	public class ProductServiceImpl implements ProductService {
 
@@ -345,7 +345,7 @@ Java::
 
 Kotlin::
 +
-[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
+[source,kotlin,indent=0,subs="verbatim,quotes"]
 ----
 	class ProductServiceImpl(transactionManager: PlatformTransactionManager,
 							private val productDao: ProductDao) : ProductService {

framework-docs/modules/ROOT/pages/data-access/orm/jpa.adoc

@@ -299,7 +299,7 @@ shows a plain JPA DAO implementation that uses the `@PersistenceUnit` annotation
 ======
 Java::
 +
-[source,java,indent=0,subs="verbatim,quotes",role="primary"]
+[source,java,indent=0,subs="verbatim,quotes"]
 ----
 	public class ProductDaoImpl implements ProductDao {
 
@@ -328,7 +328,7 @@ Java::
 
 Kotlin::
 +
-[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
+[source,kotlin,indent=0,subs="verbatim,quotes"]
 ----
 	class ProductDaoImpl : ProductDao {
 
@@ -394,7 +394,7 @@ EntityManager) to be injected instead of the factory. The following example show
 ======
 Java::
 +
-[source,java,indent=0,subs="verbatim,quotes",role="primary"]
+[source,java,indent=0,subs="verbatim,quotes"]
 ----
 	public class ProductDaoImpl implements ProductDao {
 
@@ -411,7 +411,7 @@ Java::
 
 Kotlin::
 +
-[source,kotlin,indent=0,subs="verbatim,quotes",role="secondary"]
+[source,kotlin,indent=0,subs="verbatim,quotes"]
 ----
 	class ProductDaoImpl : ProductDao {