remove old cmake include generate header

This should already be taken care of by target_include_dir

Contributes to CURA-8640

CMakeLists.txt

@@ -5,6 +5,7 @@ AssureOutOfSourceBuilds()
 
 include(CMakePackageConfigHelpers)
 include(GenerateExportHeader)
+generate_export_header(Savitar EXPORT_FILE_NAME src/SavitarExport.h)
 
 option(BUILD_PYTHON "Build " ON)
 option(BUILD_STATIC "Build as a static library" OFF)
@@ -137,13 +138,6 @@ set_target_properties(Savitar PROPERTIES
     VISIBILITY_INLINES_HIDDEN 1
 )
 
-generate_export_header(Savitar
-    EXPORT_FILE_NAME src/SavitarExport.h
-)
-# This is required when building out-of-tree.
-# The compiler won't find the generated header otherwise.
-include_directories(${CMAKE_BINARY_DIR}/src)
-
 install(TARGETS Savitar
     EXPORT Savitar-targets
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}