Removes unused files from PC folder.

PC/icons.mak

-python_icon.exe:	py.res empty.obj
-	link /out:python_icon.exe /machine:x86 /subsystem:windows py.res empty.obj
-
-py.res:	py.ico pyc.ico pycon.ico icons.rc
-	rc /fo py.res icons.rc
-
-empty.obj:	empty.c
-	cl /c empty.c
-

PC/icons.rc

-101 ICON "py.ico"
-102 ICON "pyc.ico"
-103 ICON "pycon.ico"
-

PC/make_versioninfo.c

-#include <stdio.h>
-#include "patchlevel.h"
-/*
- * This program prints out an include file containing fields required to build
- * the version info resource of pythonxx.dll because the resource compiler
- * cannot do the arithmetic.
- */
-/*
- * FIELD3 is the third field of the version number.
- * This is what we'd like FIELD3 to be:
- *
- * #define FIELD3 (PY_MICRO_VERSION*1000 + PY_RELEASE_LEVEL*10 + PY_RELEASE_SERIAL)
- *
- * but that neither gives an error nor comes anywhere close to working.
- *
- * For 2.4a0,
- * PY_MICRO_VERSION = 0
- * PY_RELEASE_LEVEL = 'alpha' = 0xa
- * PY_RELEASE_SERIAL = 0
- *
- * gives FIELD3 = 0*1000 + 10*10 + 0 = 100
- */
-int main(int argc, char **argv)
-{
-    printf("/* This file created by make_versioninfo.exe */\n");
-    printf("#define FIELD3 %d\n",
-        PY_MICRO_VERSION*1000 + PY_RELEASE_LEVEL*10 + PY_RELEASE_SERIAL);
-    printf("#define MS_DLL_ID \"%d.%d\"\n",
-           PY_MAJOR_VERSION, PY_MINOR_VERSION);
-    printf("#ifndef _DEBUG\n");
-    printf("#define PYTHON_DLL_NAME \"python%d%d.dll\"\n",
-           PY_MAJOR_VERSION, PY_MINOR_VERSION);
-    printf("#else\n");
-    printf("#define PYTHON_DLL_NAME \"python%d%d_d.dll\"\n",
-           PY_MAJOR_VERSION, PY_MINOR_VERSION);
-    printf("#endif\n");
-    return 0;
-}