external/boost/boost_1_60_0.undef.warning.patch should no longer be necessary

...(at least the original BOOST_GCC_VERSION part) as Boost 1.69.0
boost/config/workaround.hpp contains

> #ifndef BOOST_GCC
> #define BOOST_GCC_WORKAROUND_GUARD 1
> #define BOOST_GCC_VERSION_WORKAROUND_GUARD 1
> #else
> #define BOOST_GCC_WORKAROUND_GUARD 0
> #define BOOST_GCC_VERSION_WORKAROUND_GUARD 0
> #endif

Change-Id: I7690db147dbe776ff51b94fc9950b890bb290bda
Reviewed-on: https://gerrit.libreoffice.org/67000
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

external/boost/boost_1_60_0.undef.warning.patch

 --- a/b/boost/boost/config/workaround.hpp
 +++ a/b/boost/boost/config/workaround.hpp
-@@ -237,6 +237,19 @@
+@@ -237,6 +237,13 @@
  #else
  #define BOOST_INTEL_WORKAROUND_GUARD 0
  #endif
 +
-+#ifndef BOOST_GCC_VERSION
-+#define BOOST_GCC_VERSION_WORKAROUND_GUARD 1
-+#else
-+#define BOOST_GCC_VERSION_WORKAROUND_GUARD 0
-+#endif
-+
 +#ifndef __clang_major__
 +#define __clang_major___WORKAROUND_GUARD 1
 +#else