ion-list lines="none" not working on ios

[Rift-Walker]

Bug Report

Ionic Info

Ionic:

   ionic (Ionic CLI)          : 4.0.0-rc.10 (/Users/nathanwalker/.nvm/versions/node/v8.11.3/lib/node_modules/ionic)
   Ionic Framework            : @ionic/angular 4.0.0-alpha.10
   @angular-devkit/core       : 0.7.0-rc.1
   @angular-devkit/schematics : 0.7.0-rc.1
   @angular/cli               : 6.0.8
   @ionic/ng-toolkit          : 1.0.0-rc.9
   @ionic/schematics-angular  : 1.0.0-rc.9

Cordova:

   cordova (Cordova CLI) : 8.0.0
   Cordova Platforms     : android 7.0.0 ios 4.5.4

System:

   ios-deploy : 1.9.2
   NodeJS     : v8.11.3 (/Users/nathanwalker/.nvm/versions/node/v8.11.3/bin/node)
   npm        : 5.6.0
   OS         : macOS High Sierra
   Xcode      : Xcode 9.4.1 Build version 9F2000

Environment:

   ANDROID_HOME : not set

Describe the Bug
ion-list with lines="none" still has lines in ios mode.

Steps to Reproduce
Steps to reproduce the behavior:

1. Instantiate an ion-list with lines="none"
2. ionic serve --platform=ios
3. See lines under list items

Related Code
https://plnkr.co/edit/2l5i8L4bDOeAf03nIiQ9?p=preview

Expected Behavior
A list with lines="none" should have no lines.

Additional Context
The problem is here:
https://github.com/ionic-team/ionic/blob/ea7d09b41ebaa171d46fc370cfe593f813403a64/core/src/components/list/list.ios.scss#L11-L14
I don't know what the purpose of this line is, but we could change it to something like this:
.list-ios:not(.list-inset):not(.list-ios-lines-none) .item:last-child {

[ionitron-bot]

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