Cleanup unnecessary comments and string

app/src/main/java/com/wbrawner/simplemarkdown/view/activity/SettingsActivity.java

@@ -7,10 +7,6 @@ import android.view.MenuItem;
 
 import com.wbrawner.simplemarkdown.R;
 
-/**
- * Created by billy on 1/14/2018.
- */
-
 public class SettingsActivity extends AppCompatActivity {
 
     public static final String KEY_DOCS_PATH = "defaultRootDir";

app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SettingsFragment.java

@@ -6,10 +6,6 @@ import android.support.annotation.Nullable;
 
 import com.wbrawner.simplemarkdown.R;
 
-/**
- * Created by billy on 1/14/2018.
- */
-
 public class SettingsFragment extends PreferenceFragment {
     @Override
     public void onCreate(@Nullable Bundle savedInstanceState) {

app/src/main/res/values/strings.xml

@@ -27,7 +27,6 @@
     <string name="action_use_sdcard">Use SD Card</string>
     <string name="action_done">Done</string>
     <string name="action_open">Open</string>
-    <string name="recover_file">An autosaved version of this file was found. Would you like to recover it?</string>
     <string name="yes">Yes</string>
     <string name="no">No</string>
     <string name="title_activity_settings">Settings</string>