remove the repeat 'the' (#29455)

Author: 180909

Modules/_ctypes/libffi_osx/README

@@ -165,7 +165,7 @@ for checking. It will be one of the following:
 Before making the call, the VALUES vector should be initialized 
 with pointers to the appropriate argument values.
 
-To call the the function using the initialized ffi_cif, use the
+To call the function using the initialized ffi_cif, use the
 ffi_call function:
 
 void ffi_call(ffi_cif *cif, void *fn, void *rvalue, void **avalues);