Automatic Versioning was introduced in 1.6.3

ArduinoAddons/Arduino_1.5.x/hardware/marlin/avr/platform.local.txt

@@ -1,2 +0,0 @@
-compiler.cpp.extra_flags=-DHAS_AUTOMATIC_VERSIONING
-recipe.hooks.prebuild.pattern=/usr/local/bin/generate_version_header_for_marlin "{build.source.path}" "{build.path}/_Version.h"