fix: update tracing-subscriber version and remove tracing-core dependency

Author: ganeshnj

Cargo.lock

@@ -12,9 +12,8 @@ bench = false
 [dependencies]
 ddcommon-ffi = { path = "../ddcommon-ffi", default-features = false }
 tracing = { version = "0.1", default-features = false }
-tracing-subscriber = { version = "0.3.19", features = ["json", "env-filter"] }
+tracing-subscriber = { version = "0.3.18", default-features = false, features = ["json", "env-filter"] }
 tracing-appender = "0.2.3"
-tracing-core = { version = "0.1", default-features = false }
 once_cell = "1.8"
 
 [dev-dependencies]