deleted unneeded crates and peripheral code

Author: Athryx

decoder/decoder/Cargo.lock

@@ -7,7 +7,6 @@ edition = "2021"
 cortex-m = "0.7.7"
 cortex-m-rt = { version = "0.7.2", features = ["set-sp", "set-vtor"] }
 max78000_hal = { path = "../max78000_hal" }
-design_utils = { path = "../design_utils" }
 bytemuck = { version = "1.14.1", features = ["must_cast", "derive"] }
 thiserror-no-std = "2.0.2"
 rand_core = { version = "0.6.4", default-features = false }