Remove additional unnecessary dependencies.

app/build.gradle

@@ -77,14 +77,11 @@ dependencies {
     androidTestUtil 'androidx.test:orchestrator:1.1.1'
 
     // Debugging
-    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"
     testImplementation "com.squareup.leakcanary:leakcanary-android-no-op:$LEAK_CANARY_VERSION"
 
     // Support libraries
-    implementation "androidx.legacy:legacy-support-v4:1.0.0"
-    implementation "androidx.appcompat:appcompat:1.0.2"
     implementation "com.google.android.material:material:1.1.0-alpha04"
     implementation "androidx.browser:browser:1.0.0"
     implementation "androidx.cardview:cardview:1.0.0"

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

@@ -12,7 +12,6 @@
 
 import com.facebook.drawee.backends.pipeline.Fresco;
 import com.facebook.imagepipeline.core.ImagePipelineConfig;
-import com.facebook.stetho.Stetho;
 import com.squareup.leakcanary.LeakCanary;
 import com.squareup.leakcanary.RefWatcher;
 
@@ -143,10 +142,6 @@ public void onCreate() {
             // TODO: Remove when we're able to initialize Fresco in test builds.
         }
 
-        if (BuildConfig.DEBUG && !isRoboUnitTest()) {
-            Stetho.initializeWithDefaults(this);
-        }
-
         createNotificationChannel(this);
 
         languageLookUpTable = new AppLanguageLookUpTable(this);

app/src/main/java/fr/free/nrw/commons/auth/SessionManager.java

@@ -7,7 +7,8 @@
 import android.content.Context;
 import android.os.Bundle;
 
-import javax.annotation.Nullable;
+import androidx.annotation.Nullable;
+
 import javax.inject.Inject;
 import javax.inject.Named;
 import javax.inject.Singleton;

app/src/main/java/fr/free/nrw/commons/category/CategoryImageUtils.java

@@ -1,22 +1,13 @@
 package fr.free.nrw.commons.category;
 
-import androidx.annotation.NonNull;
-
-import org.apache.commons.lang3.StringUtils;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
-import org.wikipedia.util.StringUtil;
 
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
-import javax.annotation.Nullable;
-
-import fr.free.nrw.commons.Media;
-import timber.log.Timber;
-
 public class CategoryImageUtils {
 
     /**

app/src/main/java/fr/free/nrw/commons/filepicker/UploadableFile.java

@@ -6,6 +6,8 @@
 import android.os.Parcel;
 import android.os.Parcelable;
 
+import androidx.annotation.Nullable;
+
 import com.drew.imaging.ImageMetadataReader;
 import com.drew.imaging.ImageProcessingException;
 import com.drew.metadata.Metadata;
@@ -15,8 +17,6 @@
 import java.io.IOException;
 import java.util.Date;
 
-import javax.annotation.Nullable;
-
 import fr.free.nrw.commons.upload.FileUtils;
 
 public class UploadableFile implements Parcelable {

app/src/main/java/fr/free/nrw/commons/kvstore/JsonKvStore.java

@@ -2,15 +2,15 @@
 
 import android.content.Context;
 
+import androidx.annotation.Nullable;
+
 import com.google.gson.Gson;
 import com.google.gson.JsonSyntaxException;
 
 import java.lang.reflect.Type;
 import java.util.HashMap;
 import java.util.Map;
 
-import javax.annotation.Nullable;
-
 public class JsonKvStore extends BasicKvStore {
     private final Gson gson;
 

app/src/main/java/fr/free/nrw/commons/notification/NotificationUtils.java

@@ -3,6 +3,7 @@
 import android.annotation.SuppressLint;
 import android.content.Context;
 import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
@@ -11,8 +12,6 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import javax.annotation.Nullable;
-
 import fr.free.nrw.commons.BuildConfig;
 import fr.free.nrw.commons.R;
 

app/src/main/java/fr/free/nrw/commons/review/ReviewHelper.java

@@ -6,10 +6,10 @@
 import java.util.List;
 import java.util.Random;
 
-import javax.annotation.Nullable;
 import javax.inject.Inject;
 import javax.inject.Singleton;
 
+import androidx.annotation.Nullable;
 import androidx.core.util.Pair;
 import fr.free.nrw.commons.Media;
 import fr.free.nrw.commons.mwapi.MediaWikiApi;

app/src/main/java/fr/free/nrw/commons/utils/NetworkUtils.java

@@ -7,7 +7,7 @@
 import android.net.NetworkInfo;
 import android.telephony.TelephonyManager;
 
-import javax.annotation.Nullable;
+import androidx.annotation.Nullable;
 
 import fr.free.nrw.commons.utils.model.NetworkConnectionType;