remove unnecessary dependency (#42)

win_etw_provider/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "win_etw_provider"
-version = "0.1.10"
+version = "0.1.11"
 authors = ["Arlie Davis <ardavis@microsoft.com>"]
 edition = "2018"
 description = "Enables apps to report events to Event Tracing for Windows (ETW)."
@@ -19,7 +19,6 @@ uuid = {version = "1", optional = true}
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "^0.3", features = ["evntprov", "winerror", "evntrace"] }
-w32-error = "^1.0"
 
 [dev-dependencies]
 atomic_lazy = { git = "https://github.com/sivadeilra/atomic_lazy" }