Remove redundant pycore_optimizer.h includes (#143184)

`pycore_optimizer.h` was included redundantly in
Objects/frameobject.c and Python/instrumentation.c.
Both includes are unnecessary and can be safely removed.
No functional change.

Signed-off-by: Yongtao Huang <yongtaoh2022@gmail.com>

Author: hyongtao-code

Objects/frameobject.c

@@ -17,7 +17,6 @@
 
 #include "frameobject.h"          // PyFrameLocalsProxyObject
 #include "opcode.h"               // EXTENDED_ARG
-#include "pycore_optimizer.h"
 
 #include "clinic/frameobject.c.h"
 

Python/instrumentation.c

@@ -18,7 +18,6 @@
 #include "pycore_tuple.h"         // _PyTuple_FromArraySteal()
 
 #include "opcode_ids.h"
-#include "pycore_optimizer.h"
 
 
 /* Uncomment this to dump debugging output when assertions fail */