signature does not carry the std feature anymore (#946)

Author: baloo

ecdsa/Cargo.toml

@@ -37,7 +37,7 @@ sha2 = { version = "=0.11.0-pre.5", default-features = false }
 [features]
 default = ["digest"]
 alloc = ["elliptic-curve/alloc", "signature/alloc", "spki/alloc"]
-std = ["alloc", "elliptic-curve/std", "signature/std"]
+std = ["alloc", "elliptic-curve/std"]
 
 arithmetic = ["elliptic-curve/arithmetic"]
 dev = ["arithmetic", "digest", "elliptic-curve/dev", "hazmat"]

ed25519/Cargo.toml

@@ -39,7 +39,7 @@ default = ["std"]
 alloc = ["pkcs8?/alloc"]
 pem = ["alloc", "pkcs8/pem"]
 serde_bytes = ["serde", "dep:serde_bytes"]
-std = ["pkcs8?/std", "signature/std"]
+std = ["pkcs8?/std"]
 
 [package.metadata.docs.rs]
 all-features = true

ed448/Cargo.toml

@@ -36,4 +36,4 @@ default = ["std"]
 alloc = ["pkcs8?/alloc"]
 pem = ["alloc", "pkcs8/pem"]
 serde_bytes = ["serde", "dep:serde_bytes"]
-std = ["signature/std"]
+std = ["pkcs8?/std"]