diff --git a/src/bun_core/fmt.rs b/src/bun_core/fmt.rs
index 86fbac07555b..131a09685aae 100644
--- a/src/bun_core/fmt.rs
+++ b/src/bun_core/fmt.rs
@@ -1020,14 +1020,6 @@ where
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 pub struct InvalidCharacter;
 
-impl core::fmt::Display for InvalidCharacter {
-    #[inline]
-    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-        f.write_str("InvalidCharacter")
-    }
-}
-impl core::error::Error for InvalidCharacter {}
-
 /// `WTF.parseDouble` — partial-match Latin-1 double parser. Returns `Ok` if
 /// any numeric prefix was consumed; `Err(InvalidCharacter)` on empty input or
 /// when no leading digit/sign was recognised.
diff --git a/src/bundler/bundle_v2.rs b/src/bundler/bundle_v2.rs
index db84c84224ae..faaf2e4a1c94 100644
--- a/src/bundler/bundle_v2.rs
+++ b/src/bundler/bundle_v2.rs
@@ -8088,16 +8088,6 @@ pub mod bv2_impl {
         }
     }
 
-    impl PartialEq for StableRef {
-        #[inline]
-        fn eq(&self, other: &Self) -> bool {
-            let (a_idx, a_ref) = (self.stable_source_index, self.r#ref);
-            let (b_idx, b_ref) = (other.stable_source_index, other.r#ref);
-            a_idx == b_idx && a_ref == b_ref
-        }
-    }
-    impl Eq for StableRef {}
-
     #[derive(Clone, Copy, Default, PartialEq, Eq)]
     pub struct ImportTracker {
         pub(crate) source_index: Index,
diff --git a/src/css/css_parser.rs b/src/css/css_parser.rs
index 02e1717da06f..f93d34fc2717 100644
--- a/src/css/css_parser.rs
+++ b/src/css/css_parser.rs
@@ -5433,12 +5433,6 @@ pub mod color {
     pub enum ColorError {
         Parse,
     }
-    impl core::fmt::Display for ColorError {
-        fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-            f.write_str("parse")
-        }
-    }
-    impl core::error::Error for ColorError {}
 
     /// Either an angle or a number.
     pub(crate) enum AngleOrNumber {
diff --git a/src/css/lib.rs b/src/css/lib.rs
index 059245a7c196..bf2617a0338b 100644
--- a/src/css/lib.rs
+++ b/src/css/lib.rs
@@ -165,12 +165,6 @@ impl PrintErr {
         "CSSPrintError"
     }
 }
-impl core::fmt::Display for PrintErr {
-    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-        f.write_str("CSS print error")
-    }
-}
-impl core::error::Error for PrintErr {}
 
 /// Return shape used by every `to_css`
 /// path. Distinct from `css_parser::PrintResult<T> = Maybe<T, PrinterError>`,