Removed some Useless Convars

Removed:

// MultiThread \\

r_threaded_client_shadow_manager 1 // Threaded world and flashlight shadows.
cl_threaded_client_leaf_system 1 // Renders Dynamic Lightning? Ned look here https://developer.valvesoftware.com/wiki/Leaf PLEASE
cl_threaded_bone_setup 1 // Enable parallel processing of C_BaseAnimating::SetupBones()
r_threaded_renderables 1 // Determines whether part of the rendering system is multi-threaded. This can be set to 1 on systems with multi-core CPUs to potentially improve performance.

don't belong to ENB as they don't do anything to quality.(or to add realism..)