Remove 15 mins sync interval

app/src/main/java/com/readrops/app/fragments/settings/SettingsFragment.java

@@ -95,10 +95,6 @@ public class SettingsFragment extends PreferenceFragmentCompat {
         TimeUnit timeUnit;
 
         switch (newValue) {
-            case "0.15":
-                interval = 15;
-                timeUnit = TimeUnit.MINUTES;
-                break;
             case "0.30":
                 interval = 30;
                 timeUnit = TimeUnit.MINUTES;

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

@@ -113,7 +113,6 @@
     <string name="download_image_permission">Le téléchargement de l\'image nécessite l\'accès au stockage</string>
     <string name="auto_synchro">Synchronisation automatique</string>
     <string name="manual">Manuel</string>
-    <string name="mins_15">15 min</string>
     <string name="min_30">30 min</string>
     <string name="hour_1">1 heure</string>
     <string name="hour_2">2 heures</string>

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

@@ -52,7 +52,6 @@
 
     <string-array name="synchro">
         <item>@string/manual</item>
-        <item>@string/mins_15</item>
         <item>@string/min_30</item>
         <item>@string/hour_1</item>
         <item>@string/hour_2</item>
@@ -64,7 +63,6 @@
 
     <string-array name="synchro_values">
         <item>0</item>
-        <item>0.15</item>
         <item>0.30</item>
         <item>1</item>
         <item>2</item>

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

@@ -120,7 +120,6 @@
     <string name="download_image_permission">To download the image, storage permission is needed</string>
     <string name="auto_synchro">Automatic synchronisation</string>
     <string name="manual">Manual</string>
-    <string name="mins_15">15 mins</string>
     <string name="min_30">30 mins</string>
     <string name="hour_1">1 hour</string>
     <string name="hour_2">2 hours</string>