Revert "prometheus nested query support"

public/app/plugins/datasource/prometheus/datasource.ts

@@ -157,7 +157,6 @@ export class PrometheusDatasource {
 
 
     // Only replace vars in expression after having (possibly) updated interval vars
     // Only replace vars in expression after having (possibly) updated interval vars
     query.expr = this.templateSrv.replace(target.expr, scopedVars, this.interpolateQueryExpr);
     query.expr = this.templateSrv.replace(target.expr, scopedVars, this.interpolateQueryExpr);
-    query.expr = this.replaceNestedQuery(query.expr, options);
     query.requestId = options.panelId + target.refId;
     query.requestId = options.panelId + target.refId;
     return query;
     return query;
   }
   }
@@ -272,13 +271,6 @@ export class PrometheusDatasource {
     });
     });
   }
   }
 
 
-  replaceNestedQuery(query, options) {
-    return query.replace(/\#([A-Z])/g, (match, g1) => {
-      let replaceTarget = options.targets.find((t) => { return t.refId === g1; });
-      return replaceTarget ? replaceTarget.expr : match;
-    });
-  }
-
   transformMetricData(md, options, start, end, step) {
   transformMetricData(md, options, start, end, step) {
     var dps = [],
     var dps = [],
       metricLabel = null;
       metricLabel = null;

public/app/plugins/datasource/prometheus/specs/datasource_specs.ts

@@ -590,19 +590,4 @@ describe('PrometheusDatasource', function() {
       expect(query.scopedVars.__interval_ms.value).to.be(5 * 1000);
       expect(query.scopedVars.__interval_ms.value).to.be(5 * 1000);
     });
     });
   });
   });
-  describe('The nested query', function() {
-    it('should generate correct query', function() {
-      let query = 'sum(rate(#A[1m]))';
-      let options = {
-        targets: [
-          {
-            refId: 'A',
-            expr: 'http_requests_total'
-          }
-        ]
-      };
-      let result = ctx.ds.replaceNestedQuery(query, options);
-      expect(result).to.be('sum(rate(http_requests_total[1m]))');
-    });
-  });
 });
 });