Fix #2547: Drop request.GET (#2548)

CHANGES/2547.removal

@@ -0,0 +1 @@
+Drop deprecated `request.GET` property.

aiohttp/web_request.py

@@ -356,13 +356,6 @@ def query(self):
         """A multidict with all the variables in the query string."""
         return self._rel_url.query
 
-    @property
-    def GET(self):
-        """A multidict with all the variables in the query string."""
-        warnings.warn("GET property is deprecated, use .query instead",
-                      DeprecationWarning)
-        return self._rel_url.query
-
     @property
     def query_string(self):
         """The query string in the URL.

tests/test_web_request.py

@@ -47,9 +47,6 @@ def test_ctor():
     assert req.raw_headers == ((b'FOO', b'bar'),)
     assert req.task is req._task
 
-    with pytest.warns(DeprecationWarning):
-        assert req.GET is req.query
-
 
 def test_doubleslashes():
     # NB: //foo/bar is an absolute URL with foo netloc and /bar path