chore: remove unused rustc-hex deps; enable rustc-hex for primitive-t…

…ypes in sp-core (paritytech#4860)

Some primitives have impl Hex related traits enabled by `rustc-hex`
feature. People wanna use H256/H160 maybe need these trait impls

---------

Co-authored-by: command-bot <>
Co-authored-by: Bastian Köcher <git@kchr.de>

bridges/snowbridge/primitives/router/Cargo.toml

@@ -30,7 +30,6 @@ snowbridge-core = { workspace = true }
 hex-literal = { workspace = true, default-features = true }
 
 [dev-dependencies]
-rustc-hex = { workspace = true, default-features = true }
 
 [features]
 default = ["std"]

polkadot/runtime/parachains/Cargo.toml

@@ -14,7 +14,6 @@ impl-trait-for-tuples = { workspace = true }
 bitvec = { features = ["alloc"], workspace = true }
 codec = { features = ["derive", "max-encoded-len"], workspace = true }
 log = { workspace = true }
-rustc-hex = { workspace = true }
 scale-info = { features = ["derive"], workspace = true }
 serde = { features = ["alloc", "derive"], workspace = true }
 derive_more = { workspace = true, default-features = true }
@@ -98,7 +97,6 @@ std = [
 	"polkadot-runtime-metrics/std",
 	"rand/std",
 	"rand_chacha/std",
-	"rustc-hex/std",
 	"scale-info/std",
 	"serde/std",
 	"sp-api/std",

polkadot/runtime/westend/Cargo.toml

@@ -15,7 +15,6 @@ bitvec = { features = ["alloc"], workspace = true }
 codec = { features = ["derive", "max-encoded-len"], workspace = true }
 scale-info = { features = ["derive"], workspace = true }
 log = { workspace = true }
-rustc-hex = { workspace = true }
 serde = { workspace = true }
 serde_derive = { optional = true, workspace = true }
 smallvec = { workspace = true, default-features = true }
@@ -201,7 +200,6 @@ std = [
 	"polkadot-primitives/std",
 	"polkadot-runtime-common/std",
 	"polkadot-runtime-parachains/std",
-	"rustc-hex/std",
 	"scale-info/std",
 	"serde/std",
 	"serde_derive",