ml-dsa: Turn off unsused default features so that no_std works (#989)

Author: 0xFE4415

ml-dsa/Cargo.toml

@@ -33,10 +33,10 @@ pkcs8 = ["dep:const-oid", "dep:pkcs8"]
 
 [dependencies]
 hybrid-array = { version = "0.3", features = ["extra-sizes"] }
-num-traits = "0.2.19"
+num-traits = { version = "0.2.19", default-features = false }
 rand_core = { version = "0.9", optional = true }
 sha3 = "0.11.0-rc.0"
-signature = "3.0.0-rc.1"
+signature = { version = "3.0.0-rc.1", default-features = false }
 zeroize = { version = "1.8.1", optional = true, default-features = false }
 
 const-oid = { version = "0.10", features = ["db"], optional = true }