remove undefined fastcch dark db_module parameter

This notebook and detector are not used. And I would remove it from the tests from now on. But as I found about this error. I couldn't help myself.

db_module parameter is undefined and I removed it's condition

Description

How Has This Been Tested?

Tested during 3.5.0b1 and 3.5.0b2 beta tests on max-exfl017

Relevant Documents (optional)

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

Reviewers

@danilevc @schmidtp

notebooks/FastCCD/Characterize_Darks_NewDAQ_FastCCD_NBC_New_Common_Mode.ipynb

             parm.lower_deviation = temp_limits
             parm.upper_deviation = temp_limits
 
-    # This should be used in case of running notebook
-    # by a different method other than myMDC which already
-    # sends CalCat info.
-    # TODO: Set db_module to "" by default in the first cell
-    if not db_module:
-        db_module = get_pdu_from_db(karabo_id, karabo_da, dconst,
-                                    condition, cal_db_interface,
-                                    snapshot_at=creation_time)[0]
+    db_module = get_pdu_from_db(karabo_id, karabo_da, dconst,
+                                condition, cal_db_interface,
+                                snapshot_at=creation_time)[0]
 
     if db_output:
         md = send_to_db(db_module, karabo_id, dconst, condition, file_loc, report,