opentelemetry: disable default tracing-log feature (tokio-rs#1869)

Author: jtescher

tracing-opentelemetry/Cargo.toml

@@ -19,9 +19,6 @@ license = "MIT"
 edition = "2018"
 rust-version = "1.46.0"
 
-[features]
-default = ["tracing-log"]
-
 [dependencies]
 opentelemetry = { version = "0.17", default-features = false, features = ["trace"] }
 tracing = { path = "../tracing", version = "0.2", default-features = false, features = ["std"] }