Remove unnecessary debug artifact

Signed-off-by: Michael X. Grey <[email protected]>

Author: mxgrey

sdformat/.gitignore

@@ -1,3 +1,2 @@
 /target
-test_codegen.rs
 .vscode/

sdformat/build.rs

@@ -350,9 +350,6 @@ fn main() {
         contents += &model.code_gen("", &hashmap);
     }
 
-    // For debug
-    fs::write("test_codegen.rs", contents.clone()).unwrap();
-
     let out_dir = env::var_os("OUT_DIR").unwrap();
     let dest_path = Path::new(&out_dir).join("sdf.rs");
     fs::write(dest_path, contents).unwrap();