chore: removed unused local_file, stdout will be hardcoded in provider at the moment

crates/support/src/fs/local_file.rs

-use std::{
-    fs::File,
-    io::{Read, Write},
-    process::Stdio,
-};
-
-pub struct LocalFile(File);
-
-impl From<File> for LocalFile {
-    fn from(file: File) -> Self {
-        LocalFile(file)
-    }
-}
-
-impl From<LocalFile> for Stdio {
-    fn from(value: LocalFile) -> Self {
-        value.0.into()
-    }
-}
-
-impl Write for LocalFile {
-    fn write(&mut self, buf: &[u8]) -> Result<usize, std::io::Error> {
-        self.0.write(buf)
-    }
-
-    fn flush(&mut self) -> Result<(), std::io::Error> {
-        self.0.flush()
-    }
-}
-
-impl Read for LocalFile {
-    fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
-        self.0.read(buf)
-    }
-}