remove a spurious change to cfgmgr.py

src/lib/python/isc/config/cfgmgr.py

@@ -19,9 +19,6 @@
    configuration to the modules that need them.
 """
 
-# defect #426
-import pdb
-#
 import isc
 import signal
 import ast
@@ -103,7 +100,6 @@ class ConfigManagerData:
            output_file_name is not specified, the file used in
            read_from_file is used."""
         filename = None
-        pdb.set_trace()
         try:
             file = tempfile.NamedTemporaryFile(mode='w',
                                                prefix="b10-config.db.",