signatures: Remove unused compat feature

crates/ruma-signatures/Cargo.toml

@@ -14,7 +14,6 @@ edition = "2021"
 all-features = true
 
 [features]
-compat = ["tracing"]
 ring-compat = ["subslice"]
 unstable-exhaustive-types = []
 unstable-msc2870 = []
@@ -30,7 +29,6 @@ serde_json = "1.0.60"
 sha2 = "0.9.5"
 subslice = { version = "0.2.3", optional = true }
 thiserror = "1.0.26"
-tracing = { version = "0.1.25", optional = true }
 
 [dev-dependencies]
 assert_matches = "1.5.0"

crates/ruma/Cargo.toml

@@ -88,7 +88,6 @@ compat = [
     "ruma-common/compat",
     "ruma-client-api?/compat",
     "ruma-federation-api?/compat",
-    "ruma-signatures?/compat",
     "ruma-state-res?/compat",
 ]