File stop_using_obsolete_standards.patch of Package pdfmixtool

Index: pdfmixtool-v1.1.1/CMakeLists.txt
===================================================================
--- pdfmixtool-v1.1.1.orig/CMakeLists.txt
+++ pdfmixtool-v1.1.1/CMakeLists.txt
@@ -5,7 +5,6 @@ project (PDFMixTool VERSION 1.1.1)
 include(GNUInstallDirs)
 include(FindPkgConfig)
 
-set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 set(CMAKE_AUTOMOC ON)
 set(CMAKE_AUTORCC ON)