Removed unnecessary const/mutable nonsense.
Removed unnecessary const/mutable nonsense.


Former-commit-id: 29542f3f6055098c9a3f4641c34b1b1a9741d193
darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide