Remove excessive warning re graph variant

CHANGELOG.md

@@ -6,7 +6,7 @@ The version headers in this history reflect the versions of Apollo Server itself
 
 > The changes noted within this `vNEXT` section have not been released yet.  New PRs and commits which introduce changes should include an entry in this `vNEXT` section as part of their development.  When a release is being prepared, a new header will be (manually) created below and the the appropriate changes within that release will be moved into the new section.
 
-- _Nothing yet!_
+- `@apollo/gateway`: Don't print a warning about an unspecified "graph variant" (previously, and in many ways still, known as "schema tag") every few seconds.  We do highly recommend specifying one when using the Apollo Platform features though! [PR #3043](https://github.com/apollographql/apollo-server/pull/3043)
 
 ### v2.7.0
 

packages/apollo-gateway/src/index.ts

@@ -111,7 +111,12 @@ export class ApolloGateway implements GraphQLService {
   }
 
   public async load(options?: { engine?: GraphQLServiceEngineConfig }) {
-    if (options) this.engineConfig = options.engine;
+    if (options && options.engine) {
+      if (!options.engine.graphVariant)
+        console.warn('No graph variant provided. Defaulting to `current`.');
+      this.engineConfig = options.engine;
+    }
+
     if (this.schema) {
       return { schema: this.schema, executor: this.executor };
     }

packages/apollo-gateway/src/loadServicesFromStorage.ts

@@ -75,7 +75,6 @@ export async function getServiceDefinitionsFromStorage({
   const secret = await fetchStorageSecret(graphId, apiKeyHash);
 
   if (!graphVariant) {
-    console.warn('No graphVariant specified, defaulting to "current".');
     graphVariant = 'current';
   }