BAEL-7445, fix the formatting for pet schema and remove redurant comment

gradle-modules/gradle-customization/gradle-avro/src/main/custom/pet.avsc

@@ -3,9 +3,21 @@
   "name": "Pet",
   "namespace": "custom.avro",
   "fields": [
-    { "name": "petId", "type": "string" },
-    { "name": "name", "type": "string" },
-    { "name": "species", "type": "string" },
-    { "name": "age", "type": "int" }
+    {
+      "name": "petId",
+      "type": "string"
+    },
+    {
+      "name": "name",
+      "type": "string"
+    },
+    {
+      "name": "species",
+      "type": "string"
+    },
+    {
+      "name": "age",
+      "type": "int"
+    }
   ]
 }

gradle-modules/gradle-customization/gradle-avro/src/test/java/com.baeldung.avro/AvroCodeGenerationUnitTest.java

@@ -39,7 +39,6 @@ public class AvroCodeGenerationUnitTest {
                 .setAge(age)
                 .build();
 
-        // Assertions to verify the values
         assertEquals(petId, pet.getPetId());
         assertEquals(name, pet.getName());
         assertEquals(species, pet.getSpecies());