Remove long deprecated code from request wrapper (#9441)

Author: sevdog

rest_framework/request.py

@@ -422,13 +422,6 @@ def __getattr__(self, attr):
         except AttributeError:
             return self.__getattribute__(attr)
 
-    @property
-    def DATA(self):
-        raise NotImplementedError(
-            '`request.DATA` has been deprecated in favor of `request.data` '
-            'since version 3.0, and has been fully removed as of version 3.2.'
-        )
-
     @property
     def POST(self):
         # Ensure that request.POST uses our request parsing.
@@ -447,13 +440,6 @@ def FILES(self):
             self._load_data_and_files()
         return self._files
 
-    @property
-    def QUERY_PARAMS(self):
-        raise NotImplementedError(
-            '`request.QUERY_PARAMS` has been deprecated in favor of `request.query_params` '
-            'since version 3.0, and has been fully removed as of version 3.2.'
-        )
-
     def force_plaintext_errors(self, value):
         # Hack to allow our exception handler to force choice of
         # plaintext or html error responses.