made clippy quiet

src/any/performance/gradual.rs

@@ -168,6 +168,7 @@ impl GradualPerformance {
     }
 
     /// Returns the amount of remaining objects.
+    #[allow(clippy::len_without_is_empty)]
     pub fn len(&self) -> usize {
         match self {
             GradualPerformance::Osu(gradual) => gradual.len(),

src/catch/performance/gradual.rs

@@ -130,6 +130,7 @@ impl CatchGradualPerformance {
     }
 
     /// Returns the amount of remaining objects.
+    #[allow(clippy::len_without_is_empty)]
     pub fn len(&self) -> usize {
         self.difficulty.len()
     }

src/mania/performance/gradual.rs

@@ -112,6 +112,7 @@ impl ManiaGradualPerformance {
     }
 
     /// Returns the amount of remaining objects.
+    #[allow(clippy::len_without_is_empty)]
     pub fn len(&self) -> usize {
         self.difficulty.len()
     }

src/osu/performance/gradual.rs

@@ -122,6 +122,7 @@ impl OsuGradualPerformance {
     }
 
     /// Returns the amount of remaining objects.
+    #[allow(clippy::len_without_is_empty)]
     pub fn len(&self) -> usize {
         self.difficulty.len()
     }

src/taiko/performance/gradual.rs

@@ -121,6 +121,7 @@ impl TaikoGradualPerformance {
     }
 
     /// Returns the amount of remaining objects.
+    #[allow(clippy::len_without_is_empty)]
     pub fn len(&self) -> usize {
         self.difficulty.len()
     }