Resolve unnecessary_semicolon pedantic clippy lint

    warning: unnecessary semicolon
      --> gen/build/src/target.rs:17:10
       |
    17 |         };
       |          ^ help: remove
       |
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_semicolon
       = note: `-W clippy::unnecessary-semicolon` implied by `-W clippy::pedantic`
       = help: to override `-W clippy::pedantic` add `#[allow(clippy::unnecessary_semicolon)]`

    warning: unnecessary semicolon
       --> macro/src/expand.rs:729:6
        |
    729 |     };
        |      ^ help: remove
        |
        = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_semicolon
        = note: `-W clippy::unnecessary-semicolon` implied by `-W clippy::pedantic`
        = help: to override `-W clippy::pedantic` add `#[allow(clippy::unnecessary_semicolon)]`

gen/build/src/target.rs

@@ -10,10 +10,10 @@ pub(crate) enum TargetDir {
 pub(crate) fn find_target_dir(out_dir: &Path) -> TargetDir {
     if let Some(target_dir) = env::var_os("CARGO_TARGET_DIR") {
         let target_dir = PathBuf::from(target_dir);
-        if target_dir.is_absolute() {
-            return TargetDir::Path(target_dir);
+        return if target_dir.is_absolute() {
+            TargetDir::Path(target_dir)
         } else {
-            return TargetDir::Unknown;
+            TargetDir::Unknown
         };
     }
 

macro/src/expand.rs

@@ -726,7 +726,7 @@ fn expand_cxx_function_shim(efn: &ExternFn, types: &Types) -> TokenStream {
         if efn.throws {
             expr = quote_spanned!(span=> ::cxx::core::result::Result::Ok(#expr));
         }
-    };
+    }
     let dispatch = quote_spanned!(span=> unsafe { #setup #expr });
     let visibility = efn.visibility;
     let unsafety = &efn.sig.unsafety;