Removed more hair in support of future-generator stmts.

Include/compile.h

@@ -40,7 +40,7 @@ typedef struct {
    compiled *by* a code object knows whether to allow yield stmts.  In
    effect, this passes on the "from __future__ import generators" state
    in effect when the code block was compiled. */
-#define CO_GENERATOR_ALLOWED    0x1000
+#define CO_GENERATOR_ALLOWED    0x1000 /* no longer used in an essential way */
 #define CO_FUTURE_DIVISION    	0x2000
 
 extern DL_IMPORT(PyTypeObject) PyCode_Type;

Include/pythonrun.h

@@ -7,8 +7,8 @@
 extern "C" {
 #endif
 
-#define PyCF_MASK (CO_GENERATOR_ALLOWED | CO_FUTURE_DIVISION)
-#define PyCF_MASK_OBSOLETE (CO_NESTED)
+#define PyCF_MASK (CO_FUTURE_DIVISION)
+#define PyCF_MASK_OBSOLETE (CO_GENERATOR_ALLOWED | CO_NESTED)
 
 typedef struct {
 	int cf_flags;  /* bitmask of CO_xxx flags relevant to future */

Python/future.c

@@ -35,7 +35,7 @@ future_check_features(PyFutureFeatures *ff, node *n, char *filename)
 		if (strcmp(feature, FUTURE_NESTED_SCOPES) == 0) {
 			continue;
 		} else if (strcmp(feature, FUTURE_GENERATORS) == 0) {
-			ff->ff_features |= CO_GENERATOR_ALLOWED;
+			continue;
 		} else if (strcmp(feature, FUTURE_DIVISION) == 0) {
 			ff->ff_features |= CO_FUTURE_DIVISION;
 		} else if (strcmp(feature, "braces") == 0) {