chore(spec2cdk): remove skipping iot1click service (#32899)

L1 Specs got updated (#32847), and the `iot1click` service got removed. So, there is no need to keep that service in the skipped services.


### Checklist
- [X] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: moelasmar

packages/aws-cdk-lib/scripts/gen.ts

@@ -20,7 +20,7 @@ async function main() {
   const generated = (await generateAll(awsCdkLibDir, {
     coreImport: '../../core',
     cloudwatchImport: '../../aws-cloudwatch',
-    skippedServices: ['AWS::IoT1Click'],
+    skippedServices: [],
     scopeMapPath,
   }));