chore: remove redundant step from integration test setup (#528)

This step is not needed anymore since `aws/aws-cdk` is now officially
using the new service-spec.
Previously we needed to overwrite the import statement to use the new
code.

projenrc/aws-cdk-integration-test.ts

@@ -61,7 +61,6 @@ export class AwsCdkIntegrationTest extends pj.Component {
         ...checkoutRepository(awsCdkRepo, awsCdkPath),
         ...linkPackage(options.serviceSpec, awsCdkPath),
         ...linkPackage(options.serviceSpecTypes, awsCdkPath),
-        ...useSpec2Cdk(awsCdkPath),
         ...buildAwsCdkLib(awsCdkRepo, awsCdkPath),
         ...runJsiiDiff(candidateSpec, diffIgnoreFile),
       ],
@@ -105,16 +104,6 @@ function linkPackage(project: pj.Project, targetPath: string): pj.github.workflo
   ];
 }
 
-function useSpec2Cdk(path: string): pj.github.workflows.Step[] {
-  return [
-    {
-      name: `Use spec2cdk`,
-      workingDirectory: path,
-      run: `echo "export * from '@aws-cdk/spec2cdk/lib/cfn2ts';" > packages/aws-cdk-lib/scripts/codegen.ts`,
-    },
-  ];
-}
-
 function buildAwsCdkLib(repository: string, path: string): pj.github.workflows.Step[] {
   return [
     {