refactor: move ProgramWriter to common.rs

src/meta_plugin.rs

@@ -35,21 +35,6 @@ pub trait MetaPlugin {
 
 use std::io::Write;
 
-// Writer that implements Write for the program meta plugin
-struct ProgramWriter {
-    stdin: std::process::ChildStdin,
-}
-
-impl Write for ProgramWriter {
-    fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
-        self.stdin.write(buf)
-    }
-
-    fn flush(&mut self) -> std::io::Result<()> {
-        self.stdin.flush()
-    }
-}
-
 lazy_static! {
     pub static ref META_PLUGIN_PROGRAMS: EnumMap<MetaPluginType, Option<MetaPluginProgram>> = enum_map! {
         MetaPluginType::File => {