fix clippy warning on unsued type

 - apply target configuration to StaticPlotTemplate

Signed-off-by: Andrei Gherghescu <[email protected]>

Author: andrei-ng

Diff for: plotly/src/plot.rs

@@ -20,6 +20,7 @@ struct PlotTemplate<'a> {
 
 #[derive(Template)]
 #[template(path = "static_plot.html", escape = "none")]
+#[cfg(not(target_family = "wasm"))]
 struct StaticPlotTemplate<'a> {
     plot: &'a Plot,
     format: ImageFormat,