Remove rustc_version from dependencies

Cargo.toml

@@ -32,7 +32,6 @@ quote = "1"
 syn = { version = "1", features = ["extra-traits"] }
 
 [build-dependencies]
-rustc_version = "0.2"
 peg = { version = "0.5", optional = true }
 
 [badges]

build.rs

@@ -1,23 +1,11 @@
-extern crate rustc_version;
-
 #[cfg(feature = "generate-parsing-rs")]
 extern crate peg;
 
-use rustc_version::{version_meta, Channel};
-
 #[cfg(not(feature = "generate-parsing-rs"))]
-fn main() {
-    if version_meta().unwrap().channel == Channel::Nightly {
-        println!("cargo:rustc-cfg=feature=\"nightly\"");
-    }
-}
+fn main() {}
 
 #[cfg(feature = "generate-parsing-rs")]
 fn main() {
-    if version_meta().unwrap().channel == Channel::Nightly {
-        println!("cargo:rustc-cfg=feature=\"nightly\"");
-    }
-
     let contents = match ::std::fs::read_to_string("src/parsing.rustpeg") {
         Ok(contents) => contents,
         Err(e) => panic!("{}", e),

doc/display.md

@@ -35,7 +35,7 @@ E.g. `Octal` -> `octal`, `Pointer` -> `pointer`, `UpperHex` -> `upper_hex`.
 
 # Generic data types
 
-When deriving `Display` (or other formatting trait) for a generic struct/enum, all generic type 
+When deriving `Display` (or other formatting trait) for a generic struct/enum, all generic type
 arguments used during formatting are bound by respective formatting trait.
 
 E.g., for a structure `Foo` defined like this:
@@ -63,7 +63,7 @@ The following where clauses would be generated:
 Sometimes you may want to specify additional trait bounds on your generic type parameters, so that they
 could be used during formatting. This can be done with a `#[display(bound = "...")]` attribute.
 
-`#[display(bound = "...")]` accepts a single string argument in a format similar to the format 
+`#[display(bound = "...")]` accepts a single string argument in a format similar to the format
 used in angle bracket list: `T: MyTrait, U: Trait1 + Trait2`.
 
 Only type parameters defined on a struct allowed to appear in bound-string and they can only be bound
@@ -75,9 +75,9 @@ used this way. That means that you'll **have to** explicitly specify all trait b
 struct/enum definition, or via `#[display(bound = "...")]` attribute.
 
 Note how we have to bound `U` and `V` by `Display` in the following example, as no bound is inferred.
-Not even `Display`. 
+Not even `Display`.
 
-Also note, that `"c"` case is just a curious example. Bound inference works as expected if you simply 
+Also note, that `"c"` case is just a curious example. Bound inference works as expected if you simply
 write `c` without double-quotes.
 
 ```rust
@@ -87,7 +87,7 @@ write `c` without double-quotes.
 
 #[derive(Display)]
 #[display(bound = "T: MyTrait, U: Display, V: Display")]
-#[display(fmt = "{} {} {}", "a.my_function()", "b.to_string().len()", "c")] 
+#[display(fmt = "{} {} {}", "a.my_function()", "b.to_string().len()", "c")]
 struct MyStruct<T, U, V> {
     a: T,
     b: U,
@@ -119,7 +119,6 @@ enum E {
     Binary {
         i: i8,
     },
-    #[cfg(feature = "nightly")]
     #[display(fmt = "I am C {}", "_0.display()")]
     Path(PathBuf),
 }
@@ -158,7 +157,6 @@ fn main() {
     assert_eq!(Point2D { x: 3, y: 4 }.to_string(), "(3, 4)");
     assert_eq!(E::Uint(2).to_string(), "2");
     assert_eq!(E::Binary { i: -2 }.to_string(), "I am B 11111110");
-    #[cfg(feature = "nightly")]
     assert_eq!(E::Path("abc".into()).to_string(), "I am C abc");
     assert_eq!(EE::A.to_string(), "Java EE: A");
     assert_eq!(EE::B.to_string(), "Java EE: B");

tests/display.rs

@@ -41,7 +41,6 @@ enum E {
     Binary {
         i: i8,
     },
-    #[cfg(feature = "nightly")]
     #[display(fmt = "I am C {}", "_0.display()")]
     Path(PathBuf),
 }
@@ -104,7 +103,6 @@ fn check_display() {
     assert_eq!(Error::new("Error").to_string(), "Error");
     assert_eq!(E::Uint(2).to_string(), "2");
     assert_eq!(E::Binary { i: -2 }.to_string(), "I am B 11111110");
-    #[cfg(feature = "nightly")]
     assert_eq!(E::Path("abc".into()).to_string(), "I am C abc");
     assert_eq!(EE::A.to_string(), "Java EE");
     assert_eq!(EE::B.to_string(), "Java EE");