split rtc module out to reduce repreated exactly same code

rust/src/hal/esp.rs

@@ -240,14 +240,6 @@ impl Esp<'_> {
         println!("Wrote config config {:?}", config);
         anyhow::Ok(())
     }
-    pub(crate) fn delete_config(&self) -> anyhow::Result<()> {
-        let config = Path::new(Self::CONFIG_FILE);
-        if config.exists() {
-            println!("Removing config");
-            fs::remove_file(config)?
-        }
-        anyhow::Ok(())
-    }
     pub(crate) fn mount_file_system(&mut self) -> anyhow::Result<()> {
         log(LogMessage::MountingFilesystem, 0, 0, "", "");
         let base_path = CString::new("/spiffs")?;
@@ -308,10 +300,7 @@ impl Esp<'_> {
                         OkStd(file) => {
                             let f = FileInfo {
                                 filename: file.file_name().into_string().unwrap(),
-                                size: file
-                                    .metadata()
-                                    .map(|it| it.len())
-                                    .unwrap_or_default()
+                                size: file.metadata().map(|it| it.len()).unwrap_or_default()
                                     as usize,
                             };
                             result.push(f);