Remove dependency on Traceur.

This library has not been updated in two years (may no longer be maintained?), and no longer works with
the latest RxJava.

Author: dbrant

app/build.gradle

@@ -72,7 +72,6 @@ dependencies {
     androidTestImplementation 'org.mockito:mockito-core:2.10.0'
 
     // Debugging
-    implementation 'com.tspoon.traceur:traceur:1.0.1'
     implementation 'com.facebook.stetho:stetho:1.5.0'
     debugImplementation "com.squareup.leakcanary:leakcanary-android:$LEAK_CANARY_VERSION"
     releaseImplementation "com.squareup.leakcanary:leakcanary-android-no-op:$LEAK_CANARY_VERSION"

app/src/main/java/fr/free/nrw/commons/CommonsApplication.java

@@ -16,7 +16,6 @@
 import com.facebook.stetho.Stetho;
 import com.squareup.leakcanary.LeakCanary;
 import com.squareup.leakcanary.RefWatcher;
-import com.tspoon.traceur.Traceur;
 
 import org.acra.ACRA;
 import org.acra.ReportingInteractionMode;
@@ -90,11 +89,6 @@ public class CommonsApplication extends Application {
     public void onCreate() {
         super.onCreate();
         ACRA.init(this);
-        if (BuildConfig.DEBUG) {
-            //FIXME: Traceur should be disabled for release builds until error fixed
-            //See https://github.com/commons-app/apps-android-commons/issues/1877
-            Traceur.enableLogging();
-        }
 
         ApplicationlessInjection
                 .getInstance(this)