Remove based on Proton Tkg line by request of maintainer

src/models/tool.vala

@@ -31,7 +31,7 @@ namespace ProtonPlus.Models {
             tools[2] = new Tool ("Luxtorpeda", "Luxtorpeda provides Linux-native game engines for specific Windows-only games.", "https://api.github.com/repos/luxtorpeda-dev/luxtorpeda/releases", 0);
             tools[3] = new Tool ("Boxtron", "Steam Play compatibility tool to run DOS games using native Linux DOSBox.", "https://api.github.com/repos/dreamer/boxtron/releases", 0);
             tools[4] = new Tool ("Roberta", "Steam Play compatibility tool to run adventure games using native Linux ScummVM.", "https://api.github.com/repos/dreamer/roberta/releases", 1);
-            tools[5] = new Tool ("NorthstarProton", "Custom Proton build for running the Northstar client for Titanfall 2, based on Proton Tkg.", "https://api.github.com/repos/cyrv6737/NorthstarProton/releases", 0);
+            tools[5] = new Tool ("NorthstarProton", "Custom Proton build for running the Northstar client for Titanfall 2.", "https://api.github.com/repos/cyrv6737/NorthstarProton/releases", 0);
 
             return tools;
         }