[HHH-19365]fix comments and remove unused skip

Author: liubao68

hibernate-core/src/test/java/org/hibernate/orm/test/mapping/basic/XmlMappingTests.java

@@ -100,7 +100,7 @@ public void tearDown(SessionFactoryScope scope) {
 	}
 
 	@Test
-	@SkipForDialect(dialectClass = GaussDBDialect.class, reason = "opengauss don't support")
+	@SkipForDialect(dialectClass = GaussDBDialect.class, reason = "GaussDB don't support this xml feature")
 	public void verifyMappings(SessionFactoryScope scope) {
 		final MappingMetamodelImplementor mappingMetamodel = scope.getSessionFactory()
 				.getRuntimeMetamodels()
@@ -125,7 +125,7 @@ public void verifyMappings(SessionFactoryScope scope) {
 	}
 
 	@Test
-	@SkipForDialect(dialectClass = GaussDBDialect.class, reason = "opengauss don't support")
+	@SkipForDialect(dialectClass = GaussDBDialect.class, reason = "GaussDB don't support this xml feature")
 	public void verifyReadWorks(SessionFactoryScope scope) {
 		scope.inTransaction(
 				(session) -> {
@@ -143,7 +143,7 @@ public void verifyReadWorks(SessionFactoryScope scope) {
 	@SkipForDialect(dialectClass = SybaseDialect.class, matchSubTypes = true, reason = "Sybase doesn't support comparing LOBs with the = operator")
 	@SkipForDialect(dialectClass = OracleDialect.class, matchSubTypes = true, reason = "Oracle doesn't support comparing JSON with the = operator")
 	@SkipForDialect(dialectClass = AltibaseDialect.class, reason = "Altibase doesn't support comparing CLOBs with the = operator")
-	@SkipForDialect(dialectClass = GaussDBDialect.class, reason = "opengauss don't support")
+	@SkipForDialect(dialectClass = GaussDBDialect.class, reason = "GaussDB doesn't support comparing CLOBs with the = operator")
 	public void verifyComparisonWorks(SessionFactoryScope scope) {
 		scope.inTransaction(
 				(session) ->  {

hibernate-core/src/test/java/org/hibernate/orm/test/query/criteria/CriteriaBuilderNonStandardFunctionsTest.java

@@ -17,7 +17,6 @@
 import jakarta.persistence.criteria.ParameterExpression;
 import org.hibernate.dialect.CockroachDialect;
 import org.hibernate.community.dialect.DerbyDialect;
-import org.hibernate.dialect.GaussDBDialect;
 import org.hibernate.dialect.PostgreSQLDialect;
 import org.hibernate.query.criteria.HibernateCriteriaBuilder;
 import org.hibernate.query.criteria.JpaExpression;
@@ -418,7 +417,6 @@ public void testAtan2(SessionFactoryScope scope) {
 	}
 
 	@Test
-	@SkipForDialect( dialectClass = GaussDBDialect.class, reason = "type:resolved.Function sinh(double precision) does not exist.")
 	public void testHyperbolic(SessionFactoryScope scope) {
 		scope.inTransaction( session -> {
 			HibernateCriteriaBuilder cb = session.getCriteriaBuilder();