bpo-38605: Revert making 'from __future__ import annotations' the default (GH-25490)

This reverts commits 044a1048ca93d466965afc027b91a5a9eb9ce23c and 1be456ae9d53bb1cba2b24fc86175c282d1c2169, adapting the code to changes that happened after it.
diff --git a/Lib/test/test_dis.py b/Lib/test/test_dis.py
index 19e5c0f..8e36ae2 100644
--- a/Lib/test/test_dis.py
+++ b/Lib/test/test_dis.py
@@ -237,26 +237,28 @@ def bug42562():
   2           0 SETUP_ANNOTATIONS
               2 LOAD_CONST               0 (1)
               4 STORE_NAME               0 (x)
-              6 LOAD_CONST               1 ('int')
-              8 LOAD_NAME                1 (__annotations__)
-             10 LOAD_CONST               2 ('x')
+              6 LOAD_NAME                1 (int)
+              8 LOAD_NAME                2 (__annotations__)
+             10 LOAD_CONST               1 ('x')
              12 STORE_SUBSCR
 
-  3          14 LOAD_CONST               3 ('fun(1)')
-             16 LOAD_NAME                1 (__annotations__)
-             18 LOAD_CONST               4 ('y')
-             20 STORE_SUBSCR
+  3          14 LOAD_NAME                3 (fun)
+             16 LOAD_CONST               0 (1)
+             18 CALL_FUNCTION            1
+             20 LOAD_NAME                2 (__annotations__)
+             22 LOAD_CONST               2 ('y')
+             24 STORE_SUBSCR
 
-  4          22 LOAD_CONST               0 (1)
-             24 LOAD_NAME                2 (lst)
-             26 LOAD_NAME                3 (fun)
-             28 LOAD_CONST               5 (0)
-             30 CALL_FUNCTION            1
-             32 STORE_SUBSCR
-             34 LOAD_NAME                4 (int)
-             36 POP_TOP
-             38 LOAD_CONST               6 (None)
-             40 RETURN_VALUE
+  4          26 LOAD_CONST               0 (1)
+             28 LOAD_NAME                4 (lst)
+             30 LOAD_NAME                3 (fun)
+             32 LOAD_CONST               3 (0)
+             34 CALL_FUNCTION            1
+             36 STORE_SUBSCR
+             38 LOAD_NAME                1 (int)
+             40 POP_TOP
+             42 LOAD_CONST               4 (None)
+             44 RETURN_VALUE
 """
 
 compound_stmt_str = """\