frontier: Remove unused is_empty() method

4 files changed, 0 insertions, 15 deletions

diff --git a/src/frontier.rs b/src/frontier.rs
index ccc3efa..40b1d35 100644
--- a/src/frontier.rs
+++ b/src/frontier.rs
@@ -25,9 +25,6 @@ pub trait Frontier {
     /// The number of pixels currently on the frontier.
     fn len(&self) -> usize;
 
-    /// Whether the frontier is empty.
-    fn is_empty(&self) -> bool;
-
     /// Place the given color on the frontier, and return its position.
     fn place(&mut self, rgb8: Rgb8) -> Option<(u32, u32)>;
 }
diff --git a/src/frontier/image.rs b/src/frontier/image.rs
index 5db33b8..ded0cbe 100644
--- a/src/frontier/image.rs
+++ b/src/frontier/image.rs
@@ -58,10 +58,6 @@ where
         self.len - self.deleted
     }
 
-    fn is_empty(&self) -> bool {
-        self.len() == 0
-    }
-
     fn place(&mut self, rgb8: Rgb8) -> Option<(u32, u32)> {
         let color = C::from(rgb8);
 
diff --git a/src/frontier/mean.rs b/src/frontier/mean.rs
index 25bee7d..30443c9 100644
--- a/src/frontier/mean.rs
+++ b/src/frontier/mean.rs
@@ -139,10 +139,6 @@ where
         self.len - self.deleted
     }
 
-    fn is_empty(&self) -> bool {
-        self.len() == 0
-    }
-
     fn place(&mut self, rgb8: Rgb8) -> Option<(u32, u32)> {
         let color = C::from(rgb8);
         let (x, y) = self.forest.nearest(&Target(color)).map(|n| n.item.pos)?;
diff --git a/src/frontier/min.rs b/src/frontier/min.rs
index 8c5099d..da08746 100644
--- a/src/frontier/min.rs
+++ b/src/frontier/min.rs
@@ -144,10 +144,6 @@ where
         self.len - self.deleted
     }
 
-    fn is_empty(&self) -> bool {
-        self.len() == 0
-    }
-
     fn place(&mut self, rgb8: Rgb8) -> Option<(u32, u32)> {
         let color = C::from(rgb8);
         let (x, y) = self