Update MISSING.md with deprecated modules

Author: msimacek

docs/contributor/MISSING.md

@@ -9,8 +9,6 @@ This is just a snapshot as of 2023-09-14.
  * **_dbm**:  Use from C
  * **_gdbm**:  Use from C
  * **_tkinter**: Should be used from C
- * **audioop**:  Should be useable from C
- * **nis**:  We should just use the C module
  * **syslog**:  Access to syslog. We should probably just use this from the C module.
 
 #### These are not strictly needed for now
@@ -24,10 +22,14 @@ This is just a snapshot as of 2023-09-14.
 #### These we probably won't support
  * **_opcode**:  We won't have it, our opcodes are different from CPython.
  * **_symtable**:  Interface for the compilers internal symboltable.
- * **ossaudiodev**:  Not needed, it's for Linux OSS audio
 
 #### These we should re-implement
  * **_uuid**: Can be implemented ourselves, is just 1 function
  * **grp**:  UNIX group file access. Should be added to our POSIX APIs
  * **spwd**:  UNIX shadow password file access. Should be added to our POSIX APIs
  * **parser**:  We need to implement this for our parser
+
+#### Deprecated in CPython, won't implement
+ * **audioop**:  Scheduled for removal in 3.13
+ * **ossaudiodev**:  Scheduled for removal in 3.13
+ * **nis**:  Scheduled for removal in 3.13