Remove generated spectest codes from repo.

lib/runtime/src/module.rs

@@ -42,7 +42,8 @@ impl Module {
     }
 
     /// Instantiate a webassembly module with the provided imports.
-    pub fn instantiate(&self, imports: &Imports) -> Result<Instance, String> {
+    pub fn instantiate(&self, imports: &Imports) -> Result<Instance, String>
+    {
         Instance::new(Rc::clone(&self.0), imports)
     }
 }