Update Netron to 5.5.9 (#119509)

Casks/netron.rb

@@ -1,17 +1,12 @@
 cask "netron" do
-  version "5.5.7"
-  sha256 "5b243272066d978616d2d0ea7f0899b7924d94b4c9169eb386c4bc75918f4994"
+  version "5.5.9"
+  sha256 "e0ede5d9e22fdf049e91a566806e53f40add53b4c6bbf12282f3c4ddc4d87061"
 
   url "https://github.com/lutzroeder/netron/releases/download/v#{version}/Netron-#{version}-mac.zip"
   name "Netron"
   desc "Visualizer for neural network, deep learning, and machine learning models"
   homepage "https://github.com/lutzroeder/netron"
 
-  livecheck do
-    url :url
-    regex(/^v?(\d+(?:\.\d+)+)$/i)
-  end
-
   auto_updates true
 
   app "Netron.app"