refactor: remove thiserror from dependencies

Cargo.toml

@@ -14,12 +14,12 @@ rust-version = "1.65.0"
 libc = "0.2.149"
 sctk = { package = "smithay-client-toolkit", version = "0.18.0", default-features = false, features = ["calloop"] }
 wayland-backend = { version = "0.3.0", default_features = false, features = ["client_system"] }
-thiserror = "1.0.57"
 
 [dev-dependencies]
-sctk = { package = "smithay-client-toolkit", version = "0.18.0", default-features = false, features = ["calloop", "xkbcommon"] }
-url = "2.5.0"
 dirs = "5.0.1"
+sctk = { package = "smithay-client-toolkit", version = "0.18.0", default-features = false, features = ["calloop", "xkbcommon"] }
+thiserror = "1.0.57"
+url = "2.5.0"
 
 [features]
 default = ["dlopen"]

src/mime.rs

@@ -1,16 +1,21 @@
 use std::borrow::Cow;
-use thiserror::Error;
+use std::{error, fmt};
 
 /// List of allowed mimes.
 pub static ALLOWED_TEXT_MIME_TYPES: [&str; 3] =
     ["text/plain;charset=utf-8", "UTF8_STRING", "text/plain"];
 
-#[derive(Error, Debug)]
-pub enum Error {
-    #[error("Unsupported mime type")]
-    Unsupported,
+#[derive(Debug, Clone, Copy)]
+pub struct Error;
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "Unsupported mime type")
+    }
 }
 
+impl error::Error for Error {}
+
 /// Mime type supported by clipboard.
 #[derive(Clone, Eq, PartialEq, Debug, Default)]
 #[repr(u8)]

src/text.rs

@@ -18,7 +18,7 @@ impl TryFrom<(Vec<u8>, MimeType)> for Text {
         let content = match mime_type {
             MimeType::TextPlainUtf8 | MimeType::TextPlain => normalize_to_lf(content),
             MimeType::Utf8String => content,
-            MimeType::Other(_) => return Err(Error::Unsupported),
+            MimeType::Other(_) => return Err(Error),
         };
         Ok(Text(content))
     }