Remove fallback to md5 module

All supported versions now include the hashlib module.

gramps/gui/thumbnails.py

@@ -29,10 +29,7 @@ Handles generation and access to thumbnails used in GRAMPS.
 #-------------------------------------------------------------------------
 import os
 import logging
-try:
-    from hashlib import md5
-except ImportError:
-    from md5 import md5
+from hashlib import md5
 
 #-------------------------------------------------------------------------
 #

gramps/plugins/docgen/odfdoc.py

@@ -62,10 +62,7 @@ ODFDoc : used to generate Open Office Document
 #
 #-------------------------------------------------------------------------
 import os
-try:
-    from hashlib import md5
-except ImportError:
-    from md5 import md5
+from hashlib import md5
 import zipfile
 import time
 from io import StringIO

gramps/plugins/tool/verify.py

@@ -34,10 +34,7 @@ This is the research tool, not the low-level data ingerity check.
 
 import os
 import pickle
-try:
-    from hashlib import md5
-except ImportError:
-    from md5 import md5
+from hashlib import md5
 from gramps.gen.errors import WindowActiveError
 
 #------------------------------------------------------------------------

gramps/plugins/webreport/narrativeweb.py

@@ -71,10 +71,7 @@ import os
 import sys
 import re
 import copy
-try:
-    from hashlib import md5
-except ImportError:
-    from md5 import md5
+from hashlib import md5
 import time, datetime
 import shutil
 import codecs