300_sequence_numbers should not rely on 7.0 total hits structure

rest-api-spec/src/main/resources/rest-api-spec/test/search/300_sequence_numbers.yml

@@ -33,7 +33,6 @@ setup:
               foo: bar
           seq_no_primary_term: true
 
-  - match: {hits.total.value: 1}
   - match: {hits.hits.0._seq_no: 1}
   - gte: {hits.hits.0._primary_term: 1}
 
@@ -48,7 +47,6 @@ setup:
               foo: bar
         seq_no_primary_term: true
 
-  - match: {hits.total.value: 1}
   - match: {hits.hits.0._seq_no: 1}
   - gte: {hits.hits.0._primary_term: 1}