[dagster-aws] remove stubs from runtime dependencies (#26968)

## Summary & Motivation

Somehow I forgot to remove `boto3-stubs` from the main runtime
dependencies when moving them to `stubs` extras.

Fixing this issue.

python_modules/libraries/dagster-aws/setup.py

@@ -35,7 +35,6 @@ def get_version() -> str:
     python_requires=">=3.9,<3.13",
     install_requires=[
         "boto3",
-        "boto3-stubs-lite[ecs,glue,emr,emr-serverless]",
         f"dagster{pin}",
         "packaging",
         "requests",