diff --git a/src/calng/DetectorAssembler.py b/src/calng/DetectorAssembler.py
index 878298cea3586375c4e0ba50d2422873ccca7f59..d01e8e715618ec265a1d200d97dfd9dd540d6cf1 100644
--- a/src/calng/DetectorAssembler.py
+++ b/src/calng/DetectorAssembler.py
@@ -29,11 +29,6 @@ from . import geom_utils, preview_utils, scenes, schemas, utils
 from ._version import version as deviceVersion
 
 
-corr_source_re = re.compile()
-xtdf_source_re = re.compile()
-daq_source_re = re.compile()
-
-
 class BridgeOutputOptions(enum.Enum):
     MATCHED = "matched"
     ASSEMBLED = "assembled"