For #10757: remove no-op Experiments code and dependency.

We were supposed to have removed Experiments for performance purposes.
However, I find some code dangling in the tree.

Experiments.initialize is no longer called so I suspect
Experiments.withExperiment is a no-op. I verified that the lambda
function provided to it never ran in my local geckoBetaDebug on startup.
Assuming experiments behavior doesn't change in other build types, this
change appears safe.

app/build.gradle

@@ -498,10 +498,8 @@ dependencies {
     implementation Deps.mozilla_service_sync_logins
     implementation Deps.mozilla_service_firefox_accounts
     implementation Deps.mozilla_service_glean
-    implementation Deps.mozilla_service_experiments
     implementation Deps.mozilla_service_location
 
-
     implementation Deps.mozilla_support_base
     implementation Deps.mozilla_support_ktx
     implementation Deps.mozilla_support_rustlog

app/src/geckoBeta/java/org/mozilla/fenix/engine/GeckoProvider.kt

@@ -8,7 +8,6 @@ import mozilla.components.browser.engine.gecko.autofill.GeckoLoginDelegateWrappe
 import mozilla.components.browser.engine.gecko.glean.GeckoAdapter
 import mozilla.components.concept.storage.LoginsStorage
 import mozilla.components.lib.crash.handler.CrashHandlerService
-import mozilla.components.service.experiments.Experiments
 import mozilla.components.service.sync.logins.GeckoLoginStorageDelegate
 import org.mozilla.fenix.Config
 import org.mozilla.fenix.ext.settings
@@ -50,12 +49,6 @@ object GeckoProvider {
             .debugLogging(Config.channel.isDebug)
             .build()
 
-        Experiments.withExperiment("webrender-performance-comparison-experiment") { branchName ->
-            if (branchName == "disable_webrender") {
-                runtimeSettings.extras.putInt("forcedisablewebrender", 1)
-            }
-        }
-
         if (!Settings.getInstance(context).shouldUseAutoSize) {
             runtimeSettings.automaticFontSizeAdjustment = false
             val fontSize = Settings.getInstance(context).fontSizeFactor

buildSrc/src/main/java/Dependencies.kt

@@ -117,7 +117,6 @@ object Deps {
         "org.mozilla.components:service-sync-logins:${Versions.mozilla_android_components}"
     const val mozilla_service_firefox_accounts = "org.mozilla.components:service-firefox-accounts:${Versions.mozilla_android_components}"
     const val mozilla_service_glean = "org.mozilla.components:service-glean:${Versions.mozilla_android_components}"
-    const val mozilla_service_experiments = "org.mozilla.components:service-experiments:${Versions.mozilla_android_components}"
     const val mozilla_service_location = "org.mozilla.components:service-location:${Versions.mozilla_android_components}"
 
     const val mozilla_ui_colors = "org.mozilla.components:ui-colors:${Versions.mozilla_android_components}"