Removed unused gradle function (#2955)

app/build.gradle

@@ -558,39 +558,3 @@ if (gradle.hasProperty('localProperties.dependencySubstitutions.geckoviewTopsrcd
     apply from: "${topsrcdir}/substitute-local-geckoview.gradle"
 }
 
-// -------------------------------------------------------------------------------------------------
-//  Dynamically set versionCode (See tools/build/versionCode.gradle
-// -------------------------------------------------------------------------------------------------
-
-android.applicationVariants.all { variant ->
-    def buildType = variant.buildType.name
-    if (gradle.hasProperty('userProperties.taskclusterBuild')) {
-        def versionCode = generatedVersionCode
-
-        // The Google Play Store does not allow multiple APKs for the same app that all have the
-        // same version code. Therefore we need to have different version codes for our ARM and x86
-        // builds.
-        // Our generated version code has a length of 8 (See tools/gradle/versionCode.gradle).
-        // We will prefix our ARM builds with 1 and our x86 builds with 2. Our x86 builds need a
-        // higher version code to avoid installing ARM builds on an x86 device with ARM
-        // compatibility mode.
-        def multiplier = 100000000
-
-        if (variant.flavorName.contains("x86_64")) {
-            versionCode = versionCode + (3 * multiplier)
-        } else if (variant.flavorName.contains("Aarch64")) {
-            versionCode = versionCode + (2 * multiplier)
-        } else if (variant.flavorName.contains("Arm")) {
-            versionCode = versionCode + (1 * multiplier)
-        }
-
-        variant.outputs.each { output ->
-            output.versionCodeOverride = versionCode
-        }
-    }
-
-    println("----------------------------------------------")
-    println("Build type:   " + buildType)
-    println("Flavor:       " + variant.flavorName)
-    println("Version code: " + variant.mergedFlavor.versionCode)
-}