Remove unused FileUtils after unifying

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

@@ -1,92 +0,0 @@
-package fr.free.nrw.commons.utils;
-
-import android.os.Environment;
-
-import java.io.BufferedReader;
-import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.OutputStreamWriter;
-
-import timber.log.Timber;
-
-public class FileUtils {
-    /**
-     * Read and return the content of a resource file as string.
-     *
-     * @param fileName asset file's path (e.g. "/queries/nearby_query.rq")
-     * @return the content of the file
-     */
-    public static String readFromResource(String fileName) throws IOException {
-        StringBuilder buffer = new StringBuilder();
-        BufferedReader reader = null;
-        try {
-            InputStream inputStream = FileUtils.class.getResourceAsStream(fileName);
-            if (inputStream == null) {
-                throw new FileNotFoundException(fileName);
-            }
-            reader = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
-            String line;
-            while ((line = reader.readLine()) != null) {
-                buffer.append(line).append("\n");
-            }
-        } finally {
-            if (reader != null) {
-                reader.close();
-            }
-        }
-        return buffer.toString();
-    }
-
-    /**
-     * Deletes files.
-     * @param file context
-     */
-    public static boolean deleteFile(File file) {
-        boolean deletedAll = true;
-        if (file != null) {
-            if (file.isDirectory()) {
-                String[] children = file.list();
-                for (String child : children) {
-                    deletedAll = deleteFile(new File(file, child)) && deletedAll;
-                }
-            } else {
-                deletedAll = file.delete();
-            }
-        }
-
-        return deletedAll;
-    }
-
-    public static File createAndGetAppLogsFile(String logs) {
-        try {
-            File commonsAppDirectory = new File(Environment.getExternalStorageDirectory().toString() + "/CommonsApp");
-            if (!commonsAppDirectory.exists()) {
-                commonsAppDirectory.mkdir();
-            }
-
-            File logsFile = new File(commonsAppDirectory,"logs.txt");
-            if (logsFile.exists()) {
-                //old logs file is useless
-                logsFile.delete();
-            }
-
-            logsFile.createNewFile();
-
-            FileOutputStream outputStream = new FileOutputStream(logsFile);
-            OutputStreamWriter outputStreamWriter = new OutputStreamWriter(outputStream);
-            outputStreamWriter.append(logs);
-            outputStreamWriter.close();
-            outputStream.flush();
-            outputStream.close();
-
-            return logsFile;
-        } catch (IOException ioe) {
-            Timber.e(ioe);
-            return null;
-        }
-    }
-}