chore(lambda): invalid python sample code generated

jsii-rosettta has a bug which renders invalid python when a newline is included in a string literal. Remove that string literal for now.

Fixes #13035

packages/@aws-cdk/aws-lambda/test/integ.autoscaling.lit.ts

@@ -12,7 +12,7 @@ class TestStack extends cdk.Stack {
     super(scope, id);
 
     const fn = new lambda.Function(this, 'MyLambda', {
-      code: new lambda.InlineCode('exports.handler = async () => {\nconsole.log(\'hello world\');\n};'),
+      code: new lambda.InlineCode('exports.handler = async () => { console.log(\'hello world\'); };'),
       handler: 'index.handler',
       runtime: lambda.Runtime.NODEJS_10_X,
     });
@@ -50,4 +50,4 @@ const app = new cdk.App();
 
 new TestStack(app, 'aws-lambda-autoscaling');
 
-app.synth();
+app.synth();