Remove symlink when uninstalling.

cmake/installerscript.qs

@@ -51,3 +51,15 @@ Component.prototype.createOperations = function()
         print("ERROR: running post installscript.qs" + e);
     }
 }
+
+Component.prototype.createOperationsForArchive = function(archive)
+{
+    component.createOperationsForArchive(archive);
+
+    if (systemInfo.productType === "osx") {
+        var symlinkPath = targetDirectory + "/../GPT4All.app";
+
+        // Remove the symlink during uninstallation
+        component.addOperation("Delete", symlinkPath, "UNDOEXECUTE");
+    }
+}