Remove uneeded dependencies

Author: phil-opp

Cargo.toml

@@ -29,9 +29,6 @@ exclude = ["examples/basic", "examples/test_framework"]
 anyhow = "1.0.32"
 fatfs = "0.3.4"
 gpt = "3.0.0"
-raw-cpuid = { version = "10.2.0", optional = true }
-rand = { version = "0.8.4", optional = true, default-features = false }
-rand_chacha = { version = "0.3.1", optional = true, default-features = false }
 
 [dev-dependencies]
 bootloader_test_runner = { path = "tests/runner" }