fix: Fix codacy errors

Author: Stefan Steinhauser

src/test/java/net/sf/jsqlparser/statement/delete/DeleteTest.java

@@ -385,7 +385,7 @@ void testSelectAndInsertWithin2Ctes() throws JSQLParserException {
         "DELETE FROM mytable PREFERRING HIGH mycolumn1 PLUS LOW mycolumn2"
     })
     public void testPreferringClause(String sqlStr) throws JSQLParserException {
-        TestUtils.assertSqlCanBeParsedAndDeparsed(sqlStr);
+        assertSqlCanBeParsedAndDeparsed(sqlStr);
     }
 
 }

src/test/java/net/sf/jsqlparser/statement/update/UpdateTest.java

@@ -547,7 +547,7 @@ void testSelectAndInsertWithin2Ctes() throws JSQLParserException {
         "UPDATE mytable SET mycolumn1 = mycolumn2 PREFERRING HIGH mycolumn1 PLUS LOW mycolumn2"
     })
     public void testPreferringClause(String sqlStr) throws JSQLParserException {
-        TestUtils.assertSqlCanBeParsedAndDeparsed(sqlStr);
+        assertSqlCanBeParsedAndDeparsed(sqlStr);
     }
 
 }