revert unneeded/unrelated changes

app/build.gradle

@@ -139,11 +139,6 @@ android {
         exclude 'META-INF/INDEX.LIST'
         exclude '.readme'
     }
-
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
-    }
 }
 
 dependencies {

gradle.properties

@@ -1,3 +1,2 @@
 android.enableJetifier=true
-android.useAndroidX=true
-org.gradle.jvmargs=-Xmx4096m
+android.useAndroidX=true