Remove Docker bundling in SageMaker model pkg promote pipeline (#228)

This removes the custom Docker image used for bundling assets in the
SageMaker model package promote pipeline stack.

It is unnecessary since the s3_assets.Asset` construct can natively zip
a directory via the path argument.

CHANGELOG.md

@@ -24,6 +24,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - increased timeout on finetune_llm_evaluation project from 1 hour (default) to 4 hours
 - pin `ray-operator`, `ray-cluster`, and `ray-image` modules versions
 - pin module versions for all manifests
+- the `sagemaker/sagemaker-model-package-promote-pipeline` module no longer generates a Docker image
 
 ## v1.4.0
 

modules/sagemaker/sagemaker-model-package-promote-pipeline/sagemaker_model_package_promote_pipeline/stack.py

@@ -95,7 +95,11 @@ def setup_resources(self) -> None:
 
         self.kms_key = kms.Key.from_key_arn(self, "KMSKey", self.kms_key_arn) if self.kms_key_arn else None
 
-        self.code_asset = self.setup_code_assets()
+        self.code_asset = s3_assets.Asset(
+            self,
+            "CodeAsset",
+            path=os.path.join(os.path.dirname(os.path.realpath(__file__)), "seed_code"),
+        )
         self.pipeline = self.setup_pipeline()
         self.rule = self.setup_events()
 
@@ -287,35 +291,6 @@ def setup_pipeline_deploy_project(self, metadata_path: str) -> codebuild.Pipelin
 
         return project
 
-    def setup_code_assets(self) -> s3_assets.Asset:
-        """Deploy seed code to an S3 bucket.
-
-        Returns
-        -------
-            A Asset instance.
-        """
-        zip_image = cdk.DockerImage.from_build("images/zip-image")
-        path = os.path.join(os.path.dirname(os.path.realpath(__file__)), "seed_code")
-
-        bundling = cdk.BundlingOptions(
-            image=zip_image,
-            command=[
-                "sh",
-                "-c",
-                """zip -r /asset-output/code_asset.zip .""",
-            ],
-            output_type=cdk.BundlingOutput.ARCHIVED,
-        )
-
-        code_asset = s3_assets.Asset(
-            self,
-            "CodeAsset",
-            path=path,
-            bundling=bundling,
-        )
-
-        return code_asset
-
     def setup_events(self) -> Optional[events.Rule]:
         """Setup an event rule