Remove unused import statements.

android/src/com/reecedunn/espeak/CheckVoiceData.java

@@ -40,7 +40,6 @@ import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
-import java.util.Set;
 
 public class CheckVoiceData extends Activity {
     private static final String TAG = "eSpeakTTS";

android/src/com/reecedunn/espeak/TtsService.java

@@ -29,7 +29,6 @@ import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
-import android.content.SharedPreferences;
 import android.media.AudioTrack;
 import android.os.Bundle;
 import android.preference.PreferenceManager;

android/src/com/reecedunn/espeak/preference/SpeakPunctuationPreference.java

@@ -23,11 +23,8 @@ import android.preference.DialogPreference;
 import android.text.Editable;
 import android.util.AttributeSet;
 import android.view.View;
-import android.widget.Button;
 import android.widget.EditText;
 import android.widget.RadioButton;
-import android.widget.SeekBar;
-import android.widget.TextView;
 
 import com.reecedunn.espeak.R;
 import com.reecedunn.espeak.SpeechSynthesis;

android/src/com/reecedunn/espeak/preference/VoiceVariantPreference.java

@@ -21,16 +21,12 @@ import android.content.Context;
 import android.content.DialogInterface;
 import android.content.SharedPreferences;
 import android.preference.DialogPreference;
-import android.text.Editable;
 import android.util.AttributeSet;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.ArrayAdapter;
-import android.widget.EditText;
-import android.widget.RadioButton;
 import android.widget.Spinner;
 import android.widget.TextView;
 
@@ -39,8 +35,6 @@ import com.reecedunn.espeak.ResourceIdListAdapter;
 import com.reecedunn.espeak.VoiceSettings;
 import com.reecedunn.espeak.VoiceVariant;
 
-import java.util.List;
-
 public class VoiceVariantPreference extends DialogPreference {
     private Spinner mCategory;
     private Spinner mVariant;