Kill RUSTC_HAS_PR45225 🎉

components/style/build.rs

@@ -76,16 +76,6 @@ fn generate_properties() {
         .arg(&script)
         .arg(product)
         .arg("style-crate")
-        .envs(if std::mem::size_of::<Option<bool>>() == 1 {
-            // FIXME: remove this envs() call
-            // and make unconditional code that depends on RUSTC_HAS_PR45225
-            // once Firefox requires Rust 1.23+
-
-            // https://github.com/rust-lang/rust/pull/45225
-            vec![("RUSTC_HAS_PR45225", "1")]
-        } else {
-            vec![]
-        })
         .status()
         .unwrap();
     if !status.success() {