Don't build with install rpath on unix

CMakeLists.txt

@@ -60,7 +60,6 @@ if(APPLE)
 	set(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
 	list(APPEND CMAKE_INSTALL_RPATH "@loader_path/" "@executable_path/")
 elseif(UNIX AND NOT UNIX_STRUCTURE)
-	set(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
 	list(APPEND CMAKE_INSTALL_RPATH "$ORIGIN")
 endif()