diff --git a/bindgen-tests/tests/tests.rs b/bindgen-tests/tests/tests.rs
index 0e15155d92..c096b2e81e 100644
--- a/bindgen-tests/tests/tests.rs
+++ b/bindgen-tests/tests/tests.rs
@@ -654,7 +654,7 @@ fn build_flags_output_helper(builder: &bindgen::Builder) {
 
     let flags_quoted: Vec<String> = command_line_flags
         .iter()
-        .map(|x| format!("{}", shlex::quote(x)))
+        .map(|x| format!("{}", shlex::try_quote(x).unwrap()))
         .collect();
     let flags_str = flags_quoted.join(" ");
     println!("{}", flags_str);
diff --git a/bindgen/ir/item.rs b/bindgen/ir/item.rs
index 2941eb81e2..4eb9ef8bf4 100644
--- a/bindgen/ir/item.rs
+++ b/bindgen/ir/item.rs
@@ -85,12 +85,6 @@ pub(crate) trait HasTypeParamInArray {
     fn has_type_param_in_array(&self, ctx: &BindgenContext) -> bool;
 }
 
-/// A trait for determining if some IR thing has float or not.
-pub(crate) trait HasFloat {
-    /// Returns `true` if the thing has float, and `false` otherwise.
-    fn has_float(&self, ctx: &BindgenContext) -> bool;
-}
-
 /// A trait for iterating over an item and its parents and up its ancestor chain
 /// up to (but not including) the implicit root module.
 pub(crate) trait ItemAncestors {
@@ -1203,29 +1197,6 @@ impl HasTypeParamInArray for Item {
     }
 }
 
-impl<T> HasFloat for T
-where
-    T: Copy + Into<ItemId>,
-{
-    fn has_float(&self, ctx: &BindgenContext) -> bool {
-        debug_assert!(
-            ctx.in_codegen_phase(),
-            "You're not supposed to call this yet"
-        );
-        ctx.lookup_has_float(*self)
-    }
-}
-
-impl HasFloat for Item {
-    fn has_float(&self, ctx: &BindgenContext) -> bool {
-        debug_assert!(
-            ctx.in_codegen_phase(),
-            "You're not supposed to call this yet"
-        );
-        ctx.lookup_has_float(self.id())
-    }
-}
-
 /// A set of items.
 pub(crate) type ItemSet = BTreeSet<ItemId>;