refactor(JSModule): remove throw keyword (#4831)

Author: ArgoZhang

src/BootstrapBlazor/Extensions/JSModuleExtensions.cs

@@ -31,17 +31,8 @@ public static async Task<JSModule> LoadModule(this IJSRuntime jsRuntime, string
             fileName = $"{fileName}?v={version}";
         }
 
-        JSModule? module;
-        try
-        {
             var jSObjectReference = await jsRuntime.InvokeAsync<IJSObjectReference>(identifier: "import", fileName);
-            module = new JSModule(jSObjectReference);
-        }
-        catch (Exception)
-        {
-            throw;
-        }
-        return module;
+            return new JSModule(jSObjectReference);
     }
 
     /// <summary>