bpo-34003: Use dict instead of OrderedDict in csv.DictReader (GH-8014)

diff --git a/Lib/csv.py b/Lib/csv.py
index 58624af..eeeedab 100644
--- a/Lib/csv.py
+++ b/Lib/csv.py
@@ -11,7 +11,6 @@
                  __doc__
 from _csv import Dialect as _Dialect
 
-from collections import OrderedDict
 from io import StringIO
 
 __all__ = ["QUOTE_MINIMAL", "QUOTE_ALL", "QUOTE_NONNUMERIC", "QUOTE_NONE",
@@ -117,7 +116,7 @@
         # values
         while row == []:
             row = next(self.reader)
-        d = OrderedDict(zip(self.fieldnames, row))
+        d = dict(zip(self.fieldnames, row))
         lf = len(self.fieldnames)
         lr = len(row)
         if lf < lr: