apply some automatic clippy hints

implot-examples/implot-glium-demo/src/main.rs

@@ -1,4 +1,4 @@
-use examples_shared;
+
 use imgui::{im_str, Condition, Window};
 use implot::Context;
 

implot-examples/implot-glium-demo/src/support/clipboard.rs

@@ -11,7 +11,7 @@ pub struct ClipboardSupport(ClipboardContext);
 pub fn init() -> Option<ClipboardSupport> {
     ClipboardContext::new()
         .ok()
-        .map(|ctx| ClipboardSupport(ctx))
+        .map(ClipboardSupport)
 }
 
 impl ClipboardBackend for ClipboardSupport {

implot-examples/implot-wgpu-demo/src/main.rs

@@ -1,4 +1,4 @@
-use examples_shared;
+
 use imgui::{im_str, Condition, Window};
 use implot::Context;
 

src/plot_elements.rs

@@ -286,7 +286,7 @@ impl PlotHeatmap {
 
     /// Specify the label format for hovered data points.. `None` means no label is shown.
     pub fn with_label_format(mut self, label_format: Option<&str>) -> Self {
-        self.label_format = label_format.and_then(|x| Some(im_str!("{}", x)));
+        self.label_format = label_format.map(|x| im_str!("{}", x));
         self
     }