chore(lambda-python-alpha): remove default doc from required prop (#26727)

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Author: kaizencc

packages/@aws-cdk/aws-lambda-python-alpha/lib/function.ts

@@ -18,8 +18,6 @@ export interface PythonFunctionProps extends FunctionOptions {
   /**
    * The runtime environment. Only runtimes of the Python family are
    * supported.
-   *
-   * @default Runtime.PYTHON_3_7
    */
   readonly runtime: Runtime;