Revert "subscriber: update tracing-core to v0.1.33 (tokio-rs#3201)"

This reverts commit bfca546.

Author: Asuzhan

tracing-subscriber/Cargo.toml

@@ -39,7 +39,7 @@ local-time = ["time/local-offset"]
 nu-ansi-term = ["dep:nu-ansi-term"]
 
 [dependencies]
-tracing-core = { path = "../tracing-core", version = "0.1.33", default-features = false }
+tracing-core = { path = "../tracing-core", version = "0.1.30", default-features = false }
 
 # only required by the filter feature
 tracing = { optional = true, path = "../tracing", version = "0.1.41", default-features = false }