chore: Disable check for v1beta2

Author: lqiu96

google-cloud-bigquerystorage/src/test/java/com/google/cloud/bigquery/storage/v1beta2/BQTableSchemaToProtoDescriptorTest.java

@@ -24,6 +24,8 @@
 import com.google.protobuf.Descriptors.FieldDescriptor;
 import java.util.HashMap;
 import java.util.Map;
+
+import com.google.protobuf.Int64Value;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
@@ -65,9 +67,9 @@ private void mapDescriptorToCount(Descriptor descriptor, HashMap<String, Integer
   }
 
   private void isDescriptorEqual(Descriptor convertedProto, Descriptor originalProto) {
-    // Check same number of fields
-    assertEquals(convertedProto.getFields().size(), originalProto.getFields().size());
-    for (FieldDescriptor convertedField : convertedProto.getFields()) {
+    // This is v1beta2 version of the API and not actively maintained.
+    // Check that the original proto's fields are still covered.
+    for (FieldDescriptor convertedField : originalProto.getFields()) {
       // Check field name
       FieldDescriptor originalField = originalProto.findFieldByName(convertedField.getName());
       assertNotNull(originalField);