python3: msilib has been removed in 3.13

Change-Id: I7c13124e1eca23859837bb986dfe10c87995773d
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/195769
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
Tested-by: Jenkins

external/python3/generateExternalPackage.py

@@ -46,13 +46,9 @@ if __name__ == '__main__':
 
     for k,v in sorted(subDirDict.items()):
         print()
-        if k == "Lib/msilib":
-            print("ifeq (WNT,$(OS))")
         print("$(eval $(call gb_ExternalPackage_add_unpacked_files,python3,$(LIBO_BIN_FOLDER)/python-core-$(PYTHON_VERSION)/{},\\".format(k.replace("Lib", "lib", 3)))
         for fileName in sorted(v):
             print("\t{} \\".format(fileName))
         print("))")
-        if k == "Lib/msilib":
-            print("endif")
 
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