Remove example module and doc-example feature

Now that we use derives, not a lot of magic happens anymore. Thus, I
think it's not necessary to show the generated stuff anymore.

Cargo.toml

@@ -9,13 +9,8 @@ edition = "2018"
 default = ["toml", "yaml"]
 yaml = ["serde_yaml"]
 
-# This is used to enable the `example` module. This is only useful to generate
-# the docs for this library!
-doc-example = ["log"]
-
 [dependencies]
 confique-macro = { path = "macro" }
-log = { version = "0.4", features = ["serde"], optional = true }
 serde = { version = "1", features = ["derive"] }
 serde_yaml = { version = "0.8", optional = true }
 toml = { version = "0.5", optional = true }

src/example.rs

@@ -1,43 +0,0 @@
-//! This module demonstrate what a `config!` invocation will generate. This
-//! module exists merely for documentation purposes and is not usable from your
-//! crate.
-//!
-//! TODO
-
-use std::{net::IpAddr, path::PathBuf};
-
-// This is necessary because the macro generates a bunch of paths starting with
-// `confique`, assuming that symbol is in scope.
-#[doc(hidden)]
-use crate as confique;
-
-crate::config! {
-    // This is used here to make all items show up in the documentation.
-    #![visibility = "pub"]
-
-    /// An example configuration.
-    config: {
-        dns: {
-            /// The DNS server IP address.
-            #[example = "1.1.1.1"]
-            server: IpAddr,
-
-            /// Whether to use a local DNS resolution cache.
-            use_cache: bool = true,
-
-            /// How often to reattempt reaching the DNS server.
-            retry_attempts: u32 = 27,
-        },
-
-        #[typename = "Logger"]
-        log: {
-            /// Sets the log level. Possible values: "trace", "debug", "info",
-            /// "warn", "error" and "off".
-            level: log::LevelFilter = "info",
-
-            /// If this is set, log messages are also written to this file.
-            #[example = "/var/log/test.log"]
-            file: Option<PathBuf>,
-        },
-    }
-}