Re-remove iast .so file.

Commit DataDog/dd-trace-py@fa18def
was merged to address this.

Author: purple4reina

Dockerfile

@@ -22,8 +22,7 @@ RUN rm -rf ./python/lib/$runtime/site-packages/botocore*
 RUN rm -rf ./python/lib/$runtime/site-packages/setuptools
 RUN rm -rf ./python/lib/$runtime/site-packages/jsonschema/tests
 RUN find . -name 'libddwaf.so' -delete
-# Comment this line out for now since ddtrace now tries to import it
-# RUN rm ./python/lib/$runtime/site-packages/ddtrace/appsec/_iast/_stacktrace*.so
+RUN rm ./python/lib/$runtime/site-packages/ddtrace/appsec/_iast/_stacktrace*.so
 RUN rm ./python/lib/$runtime/site-packages/ddtrace/internal/datadog/profiling/libdd_wrapper*.so
 RUN rm ./python/lib/$runtime/site-packages/ddtrace/internal/datadog/profiling/ddup/_ddup.*.so
 # _stack_v2 may not exist for some versions of ddtrace (e.g. under python 3.13)