refactor: remove instaloader errors

src/download.rs

@@ -34,7 +34,7 @@ pub struct DownloadResult {
 ///
 /// # Arguments
 ///
-/// `cmd` is the command name (e.g. "yt-dlp" or "instaloader").
+/// `cmd` is the command name (e.g. "yt-dlp").
 /// `args` are the command arguments (owned Strings so callers can build dynamic args).
 ///
 /// # Errors
@@ -64,7 +64,6 @@ async fn run_command_in_tempdir(cmd: &str, args: &[&str]) -> Result<DownloadResu
         }
 
         let err = match cmd {
-            "instaloader" => Error::instaloader_failed(stderr),
             "yt-dlp" => Error::ytdlp_failed(stderr),
             _ => Error::Other(format!("{cmd} failed: {stderr}")),
         };

src/error.rs

@@ -5,9 +5,6 @@ pub enum Error {
     #[error("io error: {0}")]
     Io(#[from] tokio::io::Error),
 
-    #[error("instaloader failed: {0}")]
-    InstaloaderFailed(String),
-
     #[error("yt-dpl failed: {0}")]
     YTDLPFailed(String),
 
@@ -39,11 +36,6 @@ impl Error {
         Self::Other(text.into())
     }
 
-    #[inline]
-    pub fn instaloader_failed(text: impl Into<String>) -> Self {
-        Self::InstaloaderFailed(text.into())
-    }
-
     #[inline]
     pub fn ytdlp_failed(text: impl Into<String>) -> Self {
         Self::YTDLPFailed(text.into())