closes bpo-40385: Remove Tools/scripts/checkpyc.py (GH-19709)

This is one of the few files that has intimate knowledge of the pyc file
format. Since it lacks tests it tends to become outdated fairly quickly.
At present it has been broken since the introduction of PEP 552.

Author: ammaraskar

Misc/NEWS.d/next/Tools-Demos/2020-04-24-21-08-19.bpo-40385.nWIQdq.rst

@@ -0,0 +1,2 @@
+Removed the checkpyc.py tool. Please see compileall without force mode as a
+potential alternative.

Tools/scripts/README

@@ -7,7 +7,6 @@ abitype.py                Converts a C file to use the PEP 384 type definition A
 analyze_dxp.py            Analyzes the result of sys.getdxp()
 byext.py                  Print lines/words/chars stats of files by extension
 byteyears.py              Print product of a file's size and age
-checkpyc.py               Check presence and validity of ".pyc" files
 cleanfuture.py            Fix redundant Python __future__ statements
 combinerefs.py            A helper for analyzing PYTHONDUMPREFS output
 copytime.py               Copy one file's atime and mtime to another