Delete preference for Diffusion symbols

Summary:
We are doing a better job in 1) of D3069#3 and 2) is just dumb.
Let's see if someone notices this change.

Test Plan: /settings/panel/display/

Reviewers: nh, epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4789

src/applications/differential/view/DifferentialChangesetListView.php

@@ -127,14 +127,9 @@ final class DifferentialChangesetListView extends AphrontView {
         $ref,
         $changeset);
 
-      $prefs = $this->user->loadPreferences();
-      $pref_symbols = $prefs->getPreference(
-        PhabricatorUserPreferences::PREFERENCE_DIFFUSION_SYMBOLS);
       $detail->setChangeset($changeset);
       $detail->addButton($view_options);
-      if ($pref_symbols != 'disabled') {
-        $detail->setSymbolIndex(idx($this->symbolIndexes, $key));
-      }
+      $detail->setSymbolIndex(idx($this->symbolIndexes, $key));
       $detail->setVsChangesetID(idx($this->vsMap, $changeset->getID()));
       $detail->setEditable(true);
 

src/applications/diffusion/controller/DiffusionBrowseFileController.php

@@ -251,10 +251,7 @@ final class DiffusionBrowseFileController extends DiffusionController {
 
         $lang = last(explode('.', $drequest->getPath()));
 
-        $prefs = $this->getRequest()->getUser()->loadPreferences();
-        $pref_symbols = $prefs->getPreference(
-          PhabricatorUserPreferences::PREFERENCE_DIFFUSION_SYMBOLS);
-        if (isset($langs[$lang]) && $pref_symbols != 'disabled') {
+        if (isset($langs[$lang])) {
           Javelin::initBehavior(
             'repository-crossreference',
             array(

src/applications/settings/panel/PhabricatorSettingsPanelDisplayPreferences.php

@@ -24,8 +24,6 @@ final class PhabricatorSettingsPanelDisplayPreferences
     $pref_editor       = PhabricatorUserPreferences::PREFERENCE_EDITOR;
     $pref_multiedit    = PhabricatorUserPreferences::PREFERENCE_MULTIEDIT;
     $pref_titles       = PhabricatorUserPreferences::PREFERENCE_TITLES;
-    $pref_symbols      =
-      PhabricatorUserPreferences::PREFERENCE_DIFFUSION_SYMBOLS;
     $pref_monospaced_textareas =
       PhabricatorUserPreferences::PREFERENCE_MONOSPACED_TEXTAREAS;
 
@@ -40,9 +38,6 @@ final class PhabricatorSettingsPanelDisplayPreferences
       $preferences->setPreference(
         $pref_multiedit,
         $request->getStr($pref_multiedit));
-      $preferences->setPreference(
-        $pref_symbols,
-        $request->getStr($pref_symbols));
       $preferences->setPreference($pref_monospaced, $monospaced);
       $preferences->setPreference(
         $pref_monospaced_textareas,
@@ -74,7 +69,6 @@ EXAMPLE;
     $font_default = PhabricatorEnv::getEnvConfig('style.monospace');
     $font_default = phutil_escape_html($font_default);
 
-    $pref_symbols_value = $preferences->getPreference($pref_symbols);
     $pref_monospaced_textareas_value = $preferences
       ->getPreference($pref_monospaced_textareas);
     if (!$pref_monospaced_textareas_value) {
@@ -132,15 +126,6 @@ EXAMPLE;
           '<pre class="PhabricatorMonospaced">'.
           phutil_escape_html($example_string).
           '</pre>'))
-      ->appendChild(
-        id(new AphrontFormRadioButtonControl())
-        ->setLabel('Symbol Links')
-        ->setName($pref_symbols)
-        ->setValue($pref_symbols_value ? $pref_symbols_value : 'enabled')
-        ->addButton('enabled', 'Enabled (default)',
-          'Use this setting to disable linking symbol names in Differential '.
-          'and Diffusion to their definitions. This is enabled by default.')
-        ->addButton('disabled', 'Disabled', null))
       ->appendChild(
         id(new AphrontFormRadioButtonControl())
         ->setLabel('Monospaced Textareas')

src/applications/settings/storage/PhabricatorUserPreferences.php

@@ -18,7 +18,6 @@ final class PhabricatorUserPreferences extends PhabricatorUserDAO {
   const PREFERENCE_SEARCH_SHORTCUT      = 'search-shortcut';
 
   const PREFERENCE_DIFFUSION_VIEW       = 'diffusion-view';
-  const PREFERENCE_DIFFUSION_SYMBOLS    = 'diffusion-symbols';
 
   const PREFERENCE_NAV_WIDTH            = 'nav-width';
   const PREFERENCE_APP_TILES            = 'app-tiles';