Removed unused import

.orchestra/config/components/caliban.yml

 #@ load("@ytt:overlay", "overlay")
 
-#@ load("/lib/optimization_flavors.lib.yml", "typical_project_flavors")
 #@ load("/lib/cmake.lib.yml", "cmake_boost_configuration", "typical_cmake_builds")
 
 #@ load("/global_options.lib.yml", "options")

.orchestra/config/components/revng.lib.yml

-#@ load("/lib/optimization_flavors.lib.yml", "typical_project_flavors")
 #@ load("/lib/cmake.lib.yml", "cmake_boost_configuration", "typical_cmake_builds")
 
 #@ load("/global_options.lib.yml", "options")

.orchestra/config/components/revng_c.lib.yml

-#@ load("/lib/optimization_flavors.lib.yml", "typical_project_flavors")
 #@ load("/lib/cmake.lib.yml", "cmake_boost_configuration", "typical_cmake_builds")
 
 #@ load("/global_options.lib.yml", "options")