remove serverSideABTests override

Author: Jakeii

dotcom-rendering/scripts/test-data/gen-fixtures.js

@@ -334,8 +334,6 @@ requests.push(
 			delete json.config.userBenefitsApiUrl;
 			delete json.config.frontendSentryDsn;
 
-			json.config.serverSideABTests = {};
-
 			const footballMatchListPage = validateAsFootballMatchListPage(json);
 
 			// Write the new frontend fixture data
@@ -379,8 +377,6 @@ requests.push(
 			delete json.config.userBenefitsApiUrl;
 			delete json.config.frontendSentryDsn;
 
-			json.config.serverSideABTests = {};
-
 			const cricketMatchData = validateAsCricketMatchPageType(json);
 
 			// Write the new frontend fixture data