[3.11] gh-108590: Revert gh-108657 (commit 400a1cebc) (#108686) (#108694)

(cherry picked from commit 2a3926fa51)

Reverted per Serhiy's request.

Lib/sqlite3/dump.py

@@ -7,28 +7,6 @@
 # future enhancements, you should normally quote any identifier that
 # is an English language word, even if you do not have to."
 
-
-from contextlib import contextmanager
-
-
-def _force_decode(bs, *args, **kwargs):
-    # gh-108590: Don't fail if the database contains invalid Unicode data.
-    try:
-        return bs.decode(*args, **kwargs)
-    except UnicodeDecodeError:
-        return "".join([chr(c) for c in bs])
-
-
-@contextmanager
-def _text_factory(con, factory):
-    saved_factory = con.text_factory
-    con.text_factory = factory
-    try:
-        yield
-    finally:
-        con.text_factory = saved_factory
-
-
 def _iterdump(connection):
     """
     Returns an iterator to the dump of the database in an SQL text format.
@@ -85,9 +63,8 @@ def _iterdump(connection):
             table_name_ident,
             ",".join("""'||quote("{0}")||'""".format(col.replace('"', '""')) for col in column_names))
         query_res = cu.execute(q)
-        with _text_factory(connection, bytes):
-            for row in query_res:
-                yield("{0};".format(_force_decode(row[0])))
+        for row in query_res:
+            yield("{0};".format(row[0]))
 
     # Now when the type is 'index', 'trigger', or 'view'
     q = """