always try filtering out duplicate contacts, remove the setting

app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/MainActivity.kt

@@ -58,7 +58,6 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
     private var storedShowContactThumbnails = false
     private var storedShowPhoneNumbers = false
     private var storedStartNameWithSurname = false
-    private var storedFilterDuplicates = true
     private var storedShowTabs = 0
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -137,10 +136,6 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
             favorites_fragment?.startNameWithSurnameChanged(configStartNameWithSurname)
         }
 
-        if (storedFilterDuplicates != config.filterDuplicates) {
-            refreshContacts(ALL_TABS_MASK)
-        }
-
         if (werePermissionsHandled && !isFirstResume) {
             if (viewpager.adapter == null) {
                 initFragments()
@@ -213,7 +208,6 @@ class MainActivity : SimpleActivity(), RefreshContactsListener {
             storedShowContactThumbnails = showContactThumbnails
             storedShowPhoneNumbers = showPhoneNumbers
             storedStartNameWithSurname = startNameWithSurname
-            storedFilterDuplicates = filterDuplicates
             storedShowTabs = showTabs
         }
     }

app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/SettingsActivity.kt

@@ -39,7 +39,6 @@ class SettingsActivity : SimpleActivity() {
         setupShowPhoneNumbers()
         setupShowContactsWithNumbers()
         setupStartNameWithSurname()
-        setupFilterDuplicates()
         setupShowCallConfirmation()
         setupShowDialpadButton()
         setupShowDialpadLetters()
@@ -130,14 +129,6 @@ class SettingsActivity : SimpleActivity() {
         }
     }
 
-    private fun setupFilterDuplicates() {
-        settings_filter_duplicates.isChecked = config.filterDuplicates
-        settings_filter_duplicates_holder.setOnClickListener {
-            settings_filter_duplicates.toggle()
-            config.filterDuplicates = settings_filter_duplicates.isChecked
-        }
-    }
-
     private fun setupShowDialpadButton() {
         settings_show_dialpad_button.isChecked = config.showDialpadButton
         settings_show_dialpad_button_holder.setOnClickListener {

app/src/main/kotlin/com/simplemobiletools/contacts/pro/helpers/Config.kt

@@ -41,10 +41,6 @@ class Config(context: Context) : BaseConfig(context) {
                 SHOW_ADDRESSES_FIELD or SHOW_EVENTS_FIELD or SHOW_NOTES_FIELD or SHOW_GROUPS_FIELD or SHOW_CONTACT_SOURCE_FIELD)
         set(showContactFields) = prefs.edit().putInt(SHOW_CONTACT_FIELDS, showContactFields).apply()
 
-    var filterDuplicates: Boolean
-        get() = prefs.getBoolean(FILTER_DUPLICATES, true)
-        set(filterDuplicates) = prefs.edit().putBoolean(FILTER_DUPLICATES, filterDuplicates).apply()
-
     var showTabs: Int
         get() = prefs.getInt(SHOW_TABS, ALL_TABS_MASK)
         set(showTabs) = prefs.edit().putInt(SHOW_TABS, showTabs).apply()

app/src/main/kotlin/com/simplemobiletools/contacts/pro/helpers/Constants.kt

@@ -13,7 +13,6 @@ const val LAST_USED_CONTACT_SOURCE = "last_used_contact_source"
 const val ON_CONTACT_CLICK = "on_contact_click"
 const val SHOW_CONTACT_FIELDS = "show_contact_fields"
 const val SHOW_TABS = "show_tabs"
-const val FILTER_DUPLICATES = "filter_duplicates"
 const val SHOW_CALL_CONFIRMATION = "show_call_confirmation"
 const val SHOW_DIALPAD_BUTTON = "show_dialpad_button"
 const val SHOW_DIALPAD_LETTERS = "show_dialpad_letters"

app/src/main/kotlin/com/simplemobiletools/contacts/pro/helpers/ContactsHelper.kt

@@ -66,7 +66,7 @@ class ContactsHelper(val context: Context) {
                 contacts.valueAt(it)
             }
 
-            if (ignoredContactSources.isEmpty() && context.config.filterDuplicates && !getAll) {
+            if (ignoredContactSources.isEmpty() && !getAll) {
                 tempContacts = tempContacts.distinctBy {
                     it.getHashToCompare()
                 } as ArrayList<Contact>

app/src/main/res/layout/activity_settings.xml

@@ -244,30 +244,6 @@
 
         </RelativeLayout>
 
-        <RelativeLayout
-            android:id="@+id/settings_filter_duplicates_holder"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_marginTop="@dimen/medium_margin"
-            android:background="?attr/selectableItemBackground"
-            android:paddingStart="@dimen/normal_margin"
-            android:paddingTop="@dimen/activity_margin"
-            android:paddingEnd="@dimen/normal_margin"
-            android:paddingBottom="@dimen/activity_margin">
-
-            <com.simplemobiletools.commons.views.MySwitchCompat
-                android:id="@+id/settings_filter_duplicates"
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:background="@null"
-                android:clickable="false"
-                android:paddingStart="@dimen/medium_margin"
-                android:paddingLeft="@dimen/medium_margin"
-                android:text="@string/filter_duplicates"
-                app:switchPadding="@dimen/medium_margin"/>
-
-        </RelativeLayout>
-
         <RelativeLayout
             android:id="@+id/settings_show_call_confirmation_holder"
             android:layout_width="match_parent"