subscriber: remove TraceLogger (#1052)

* Remove TraceLogger

The `TraceLogger` implementation is deprecated and this PR removes it
completely.

tracing-log/Cargo.toml

@@ -17,10 +17,9 @@ license = "MIT"
 readme = "README.md"
 
 [features]
-default = ["log-tracer", "trace-logger", "std"]
+default = ["log-tracer", "std"]
 std = ["log/std"]
 log-tracer = []
-trace-logger = []
 
 [dependencies]
 tracing-core = { path = "../tracing-core", version = "0.2"}

tracing-log/src/lib.rs

@@ -59,18 +59,16 @@
 //!
 //! Note that logger implementations that convert log records to trace events
 //! should not be used with `Subscriber`s that convert trace events _back_ into
-//! log records (such as the `TraceLogger`), as doing so will result in the
-//! event recursing between the subscriber and the logger forever (or, in real
-//! life, probably overflowing the call stack).
+//! log records, as doing so will result in the event recursing between the
+//! subscriber and the logger forever (or, in real life, probably overflowing
+//! the call stack).
 //!
 //! If the logging of trace events generated from log records produced by the
 //! `log` crate is desired, either the `log` crate should not be used to
 //! implement this logging, or an additional layer of filtering will be
 //! required to avoid infinitely converting between `Event` and `log::Record`.
 //!
 //! # Feature Flags
-//! * `trace-logger`: enables an experimental `log` subscriber, deprecated since
-//!   version 0.1.1.
 //! * `log-tracer`: enables the `LogTracer` type (on by default)
 //! * `env_logger`: enables the `env_logger` module, with helpers for working
 //!   with the [`env_logger` crate].
@@ -94,7 +92,6 @@
 //! [`AsTrace`]: trait.AsTrace.html
 //! [`AsLog`]: trait.AsLog.html
 //! [`LogTracer`]: struct.LogTracer.html
-//! [`TraceLogger`]: struct.TraceLogger.html
 //! [`env_logger`]: env_logger/index.html
 //! [`tracing`]: https://crates.io/crates/tracing
 //! [`log`]: https://crates.io/crates/log
@@ -151,25 +148,11 @@ use tracing_core::{
 #[cfg_attr(docsrs, doc(cfg(feature = "log-tracer")))]
 pub mod log_tracer;
 
-#[cfg(feature = "trace-logger")]
-#[cfg_attr(docsrs, doc(cfg(feature = "trace-logger")))]
-pub mod trace_logger;
-
 #[cfg(feature = "log-tracer")]
 #[cfg_attr(docsrs, doc(cfg(feature = "log-tracer")))]
 #[doc(inline)]
 pub use self::log_tracer::LogTracer;
 
-#[cfg(feature = "trace-logger")]
-#[cfg_attr(docsrs, doc(cfg(feature = "trace-logger")))]
-#[deprecated(
-    since = "0.1.1",
-    note = "use the `tracing` crate's \"log\" feature flag instead"
-)]
-#[allow(deprecated)]
-#[doc(inline)]
-pub use self::trace_logger::TraceLogger;
-
 #[cfg(feature = "env_logger")]
 #[cfg_attr(docsrs, doc(cfg(feature = "env_logger")))]
 pub mod env_logger;