fix clippy warnings

taskchampion/lib/src/string.rs

@@ -317,7 +317,7 @@ impl<'a> From<String> for RustString<'a> {
     }
 }
 
-impl<'a> From<&str> for RustString<'static> {
+impl From<&str> for RustString<'static> {
     fn from(string: &str) -> RustString<'static> {
         RustString::String(string.to_string())
     }

taskchampion/lib/src/traits.rs

@@ -276,13 +276,11 @@ where
     let mut vec = unsafe { CL::take_val_from_arg(list, CL::null_value()) };
 
     // first, drop each of the elements in turn
-    for e in vec.drain(..) {
-        if let Some(e) = e {
-            // SAFETY:
-            //  - e is a valid Element (promised by caller)
-            //  - e is owned
-            drop(unsafe { PassByPointer::take_from_ptr_arg(e.as_ptr()) });
-        }
+    for e in vec.drain(..).flatten() {
+        // SAFETY:
+        //  - e is a valid Element (promised by caller)
+        //  - e is owned
+        drop(unsafe { PassByPointer::take_from_ptr_arg(e.as_ptr()) });
     }
     // then drop the vector
     drop(vec);