Remove obsolete MD5 compatibility wrapper

Inline the two callers, preserving usedforsecurity=False, which has been supported since Python 3.9.

datasette/database.py

@@ -1,6 +1,7 @@
 import asyncio
 import atexit
 import contextvars
+import hashlib
 import inspect
 import os
 import queue
@@ -58,7 +59,6 @@ from .utils import (
     escape_sqlite,
     get_all_foreign_keys,
     get_outbound_foreign_keys,
-    md5_not_usedforsecurity,
     sqlite3,
     sqlite_timelimit,
     table_column_details,
@@ -160,7 +160,9 @@ class Database:
     def color(self):
         if self.hash:
             return self.hash[:6]
-        return md5_not_usedforsecurity(self.name)[:6]
+        return hashlib.md5(self.name.encode("utf8"), usedforsecurity=False).hexdigest()[
+            :6
+        ]
 
     def suggest_name(self):
         if self.is_temp_disk:

datasette/utils/__init__.py

@@ -957,7 +957,7 @@ def to_css_class(s):
     """
     if css_class_re.match(s):
         return s
-    md5_suffix = md5_not_usedforsecurity(s)[:6]
+    md5_suffix = hashlib.md5(s.encode("utf8"), usedforsecurity=False).hexdigest()[:6]
     # Strip leading _, -
     s = s.lstrip("_").lstrip("-")
     # Replace any whitespace with hyphens
@@ -1757,14 +1757,6 @@ def redact_keys(original: dict, key_patterns: Iterable) -> dict:
     return redact(original)
 
 
-def md5_not_usedforsecurity(s):
-    try:
-        return hashlib.md5(s.encode("utf8"), usedforsecurity=False).hexdigest()
-    except TypeError:
-        # For Python 3.8 which does not support usedforsecurity=False
-        return hashlib.md5(s.encode("utf8")).hexdigest()
-
-
 _etag_cache = {}