Clippy fixes

Author: danieldk

build2cmake/src/torch/common.rs

@@ -99,7 +99,7 @@ pub fn write_pyproject_toml(
 
 pub fn write_metadata(general: &General, file_set: &mut FileSet) -> Result<()> {
     for backend in &Backend::all() {
-        let writer = file_set.entry(format!("metadata-{}.json", backend.to_string()));
+        let writer = file_set.entry(format!("metadata-{}.json", backend));
 
         let python_depends = general
             .python_depends()

build2cmake/src/torch/deps.rs

@@ -87,7 +87,6 @@ pub fn render_deps(env: &Environment, build: &Build, write: &mut impl Write) ->
             }
             Dependency::MetalCpp => {
                 // TODO: add CMake dependency.
-                ()
             }
             Dependency::Torch => (),
         }