Revert #2639, an attempt to fix query fragment reuse (#2681)

Author: trevor-scheer

.changeset/metal-cheetahs-add.md

@@ -0,0 +1,10 @@
+---
+"@apollo/query-planner": patch
+"@apollo/federation-internals": patch
+"@apollo/gateway": patch
+---
+
+Revert #2639 from v2.4.9
+
+PR #2639 attempts to resolve issues with query fragment reuse, but we've since turned up multiple issues (at least 1 of which is a regression - see #2680. For now, this reverts it until we resolve the regression for a future patch release.
+  

gateway-js/src/__tests__/buildQueryPlan.test.ts

@@ -744,21 +744,18 @@ describe('buildQueryPlan', () => {
 
     it(`should not get confused by a fragment spread multiple times`, () => {
       const operationString = `#graphql
-        fragment PriceAndCountry on Product {
+        fragment Price on Product {
           price
-          details {
-            country
-          }
         }
 
         query {
           topProducts {
             __typename
             ... on Book {
-              ...PriceAndCountry
+              ...Price
             }
             ... on Furniture {
-              ...PriceAndCountry
+              ...Price
             }
           }
         }
@@ -773,20 +770,16 @@ describe('buildQueryPlan', () => {
                       topProducts {
                         __typename
                         ... on Book {
-                          ...PriceAndCountry
+                          ...Price
                         }
                         ... on Furniture {
-                          ...PriceAndCountry
+                          ...Price
                         }
                       }
                     }
                     
-                    fragment PriceAndCountry on Product {
+                    fragment Price on Product {
                       price
-                      details {
-                        __typename
-                        country
-                      }
                     }
                   },
                 }