bpo-41054: Simplify resource compilation on Windows (GH-21004)


Remove auto-generated resource header. Pass definitions required
by resource files (ORIGINAL_FILENAME and FIELD3) directly to resource
compiler.

Remove unused MS_DLL_ID resource string and related dead code.
(cherry picked from commit 4efc3360c9a83d5891f27ed67b4f0ab7275d2ab4)

Co-authored-by: Nikita Nemkin <nikita@nemkin.ru>
diff --git a/PC/dl_nt.c b/PC/dl_nt.c
index 0bf04f1..7f17ee1 100644
--- a/PC/dl_nt.c
+++ b/PC/dl_nt.c
@@ -12,16 +12,10 @@
 #include "windows.h"
 
 #ifdef Py_ENABLE_SHARED
-#ifdef MS_DLL_ID
-// The string is available at build, so fill the buffer immediately
-char dllVersionBuffer[16] = MS_DLL_ID;
-#else
-char dllVersionBuffer[16] = ""; // a private buffer
-#endif
 
 // Python Globals
 HMODULE PyWin_DLLhModule = NULL;
-const char *PyWin_DLLVersionString = dllVersionBuffer;
+const char *PyWin_DLLVersionString = MS_DLL_ID;
 
 BOOL    WINAPI  DllMain (HANDLE hInst,
                                                 ULONG ul_reason_for_call,
@@ -31,11 +25,6 @@
     {
         case DLL_PROCESS_ATTACH:
             PyWin_DLLhModule = hInst;
-#ifndef MS_DLL_ID
-            // If we have MS_DLL_ID, we don't need to load the string.
-            // 1000 is a magic number I picked out of the air.  Could do with a #define, I spose...
-            LoadString(hInst, 1000, dllVersionBuffer, sizeof(dllVersionBuffer));
-#endif
             break;
 
         case DLL_PROCESS_DETACH:
diff --git a/PC/python_nt.rc b/PC/python_nt.rc
index fac6105..b5fb58f 100644
--- a/PC/python_nt.rc
+++ b/PC/python_nt.rc
@@ -7,12 +7,6 @@
 #include <winuser.h>
 2 RT_MANIFEST "python.manifest"
 
-// String Tables
-STRINGTABLE DISCARDABLE
-BEGIN
-    1000,   MS_DLL_ID
-END
-
 /////////////////////////////////////////////////////////////////////////////
 //
 // Version
@@ -40,7 +34,7 @@
             VALUE "FileVersion", PYTHON_VERSION
             VALUE "InternalName", "Python DLL\0"
             VALUE "LegalCopyright", PYTHON_COPYRIGHT "\0"
-            VALUE "OriginalFilename", PYTHON_DLL_NAME "\0"
+            VALUE "OriginalFilename", ORIGINAL_FILENAME "\0"
             VALUE "ProductName", "Python\0"
             VALUE "ProductVersion", PYTHON_VERSION
         END
diff --git a/PC/python_ver_rc.h b/PC/python_ver_rc.h
index f95e755..c318d44 100644
--- a/PC/python_ver_rc.h
+++ b/PC/python_ver_rc.h
@@ -9,7 +9,6 @@
 #define MS_WINDOWS
 #include "modsupport.h"
 #include "patchlevel.h"
-#include <pythonnt_rc.h>
 #ifdef _DEBUG
 #   define PYTHON_DEBUG_EXT "_d"
 #else