fixup! [android] Enable the connect assist experiments on alpha

Bug 42628: Remove browser.tor_android.use_new_bootstrap.

mobile/android/android-components/components/browser/engine-gecko/src/main/java/mozilla/components/browser/engine/gecko/GeckoEngine.kt

@@ -1347,11 +1347,6 @@ class GeckoEngine(
                     localeUpdater.updateValue()
                 }
             }
-        override var useNewBootstrap: Boolean
-            get() = runtime.settings.useNewBootstrap
-            set(value) {
-                runtime.settings.useNewBootstrap = value
-            }
     }.apply {
         defaultSettings?.let {
             this.javascriptEnabled = it.javascriptEnabled
@@ -1380,7 +1375,6 @@ class GeckoEngine(
             this.emailTrackerBlockingPrivateBrowsing = it.emailTrackerBlockingPrivateBrowsing
             this.torSecurityLevel = it.torSecurityLevel
             this.spoofEnglish = it.spoofEnglish
-            this.useNewBootstrap = it.useNewBootstrap
         }
     }
 

mobile/android/android-components/components/concept/engine/src/main/java/mozilla/components/concept/engine/Settings.kt

@@ -259,7 +259,6 @@ abstract class Settings {
 
     open var spoofEnglish: Boolean by UnsupportedSetting()
 
-    open var useNewBootstrap: Boolean by UnsupportedSetting()
 }
 
 /**
@@ -312,7 +311,6 @@ data class DefaultSettings(
     override var emailTrackerBlockingPrivateBrowsing: Boolean = false,
     override var torSecurityLevel: Int = 4,
     override var spoofEnglish: Boolean = false,
-    override var useNewBootstrap: Boolean = true,
 ) : Settings()
 
 class UnsupportedSetting<T> {