diff --git a/docs/conf.py b/docs/conf.py
index 982bd484c..f27d86d5b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -14,17 +14,12 @@
 import importlib
 import os
 import sys
+import tomllib
 from distutils.version import LooseVersion
 from pathlib import Path
 
 import sphinx
 import stsci_rtd_theme
-
-if sys.version_info < (3, 11):
-    import tomli as tomllib
-else:
-    import tomllib
-
 from sphinx.ext.autodoc import AttributeDocumenter
 
 from romancal.stpipe import RomanStep
diff --git a/pyproject.toml b/pyproject.toml
index fe13fd158..8ae30ed73 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,6 @@ docs = [
     "sphinx-rtd-theme",
     "stsci-rtd-theme",
     "sphinx-autobuild",
-    "tomli; python_version <=\"3.11\"",
 ]
 test = [
     "ci-watson >=0.5.0",
diff --git a/romancal/pipeline/exposure_pipeline.py b/romancal/pipeline/exposure_pipeline.py
index 815c17d2d..11b19351f 100644
--- a/romancal/pipeline/exposure_pipeline.py
+++ b/romancal/pipeline/exposure_pipeline.py
@@ -2,7 +2,6 @@
 from __future__ import annotations
 
 import logging
-from os.path import basename
 from typing import TYPE_CHECKING
 
 import numpy as np
diff --git a/romancal/step.py b/romancal/step.py
index 94344ecf1..64a4bf79b 100644
--- a/romancal/step.py
+++ b/romancal/step.py
@@ -36,6 +36,5 @@
     "SaturationStep",
     "SkyMatchStep",
     "SourceCatalogStep",
-    "SourceDetectionStep",
     "TweakRegStep",
 ]