Revert finding cbindgen.toml logic change

src/main.rs

@@ -84,18 +84,7 @@ fn load_bindings(input: &Path, matches: &ArgMatches) -> Result<Bindings, Error>
         // Load any config specified or search in the input directory
         let mut config = match matches.value_of("config") {
             Some(c) => Config::from_file(c).unwrap(),
-            None => {
-                // In contrast to `Config::from_root_or_default` we look for
-                // cbindgen.toml next to the current _file_. There is always
-                // a parent (at the very least the root), so unwrapping is fine.
-                let c = input.parent().unwrap().join("cbindgen.toml");
-
-                if c.exists() {
-                    Config::from_file(&c).unwrap()
-                } else {
-                    Config::default()
-                }
-            }
+            None => Config::from_root_or_default(input),
         };
 
         apply_config_overrides(&mut config, matches);