Feat: clean the codebase as much as possible

src/app/mod.rs

@@ -86,12 +86,7 @@ impl App {
         Self::build(variables, dict, rng, false)
     }
 
-    #[allow(dead_code)]
-    pub fn with_shared(variables: Variables, dict: Dictionary, rng: Rng) -> Self {
-        Self::build(variables, dict, rng, false)
-    }
-
-    #[allow(dead_code)]
+    #[allow(dead_code)] // used by plugin crate
     pub fn new_plugin(variables: Variables, dict: Dictionary, rng: Rng) -> Self {
         Self::build(variables, dict, rng, true)
     }