Delete the old Intellisense option pages

These were ported to Unified Settings, and since that's now the
default (and no way to go back), there's no reason to keep the legacy
ones around. I've verified the new pages still have the same contents
of the old ones.

Author: jasonmalinowski

src/VisualStudio/CSharp/Impl/CSharpPackage.cs

@@ -39,7 +39,6 @@ namespace Microsoft.VisualStudio.LanguageServices.CSharp.LanguageService;
 //         Spacing
 //         Wrapping
 //       Naming
-//     IntelliSense
 
 [ProvideLanguageEditorOptionPage(typeof(Options.AdvancedOptionPage), "CSharp", null, "Advanced", pageNameResourceId: "#102", keywordListResourceId: 306)]
 [ProvideLanguageEditorToolsOptionCategory("CSharp", "Code Style", "#114")]
@@ -51,7 +50,6 @@ namespace Microsoft.VisualStudio.LanguageServices.CSharp.LanguageService;
 [ProvideLanguageEditorOptionPage(typeof(Options.Formatting.FormattingNewLinesPage), "CSharp", @"Code Style\Formatting", "NewLines", pageNameResourceId: "#111", keywordListResourceId: 309)]
 [ProvideLanguageEditorOptionPage(typeof(Options.Formatting.FormattingSpacingPage), "CSharp", @"Code Style\Formatting", "Spacing", pageNameResourceId: "#112", keywordListResourceId: 310)]
 [ProvideLanguageEditorOptionPage(typeof(Options.NamingStylesOptionPage), "CSharp", @"Code Style", "Naming", pageNameResourceId: "#115", keywordListResourceId: 314)]
-[ProvideLanguageEditorOptionPage(typeof(Options.IntelliSenseOptionPage), "CSharp", null, "IntelliSense", pageNameResourceId: "#103", keywordListResourceId: 312)]
 [ProvideSettingsManifest(PackageRelativeManifestFile = @"UnifiedSettings\csharpSettings.registration.json")]
 [ProvideService(typeof(ICSharpTempPECompilerService), IsAsyncQueryable = false, IsCacheable = true, IsFreeThreaded = true, ServiceName = "C# TempPE Compiler Service")]
 [Guid(Guids.CSharpPackageIdString)]

src/VisualStudio/CSharp/Impl/Options/IntelliSenseOptionPage.cs

@@ -125,12 +125,6 @@
 "Page"="{eae577a7-acb9-40f5-a7b1-d2878c3c7d6f}"
 "Keywords"="#313"
 
-[$RootKey$\Languages\Language Services\CSharp\EditorToolsOptions\IntelliSense]
-@="#103"
-"Package"="{13c3bbb4-f18f-4111-9f54-a0fb010d9194}"
-"Page"="{ede66829-7a36-4c5d-8e20-9290195dcf80}"
-"Keywords"="#312"
-
 [$RootKey$\Languages\Language Services\CSharp\EditorToolsOptions\Code Style\Formatting]
 @="#107"
 "Package"="{13c3bbb4-f18f-4111-9f54-a0fb010d9194}"
@@ -200,4 +194,4 @@
 [$RootKey$\SettingsManifests\{13c3bbb4-f18f-4111-9f54-a0fb010d9194}]
 @="Microsoft.VisualStudio.LanguageServices.CSharp.LanguageService.CSharpPackage"
 "ManifestPath"="$PackageFolder$\UnifiedSettings\csharpSettings.registration.json"
-"CacheTag"=qword:18C11F0A543B8AD0
+"CacheTag"=qword:2775F6D5BE71E0F1

src/VisualStudio/CSharp/Impl/Options/IntelliSenseOptionPageControl.xaml

@@ -254,8 +254,7 @@
       "title": "@101;{13c3bbb4-f18f-4111-9f54-a0fb010d9194}"
     },
     "textEditor.csharp.intellisense": {
-      "title": "@103;{13c3bbb4-f18f-4111-9f54-a0fb010d9194}",
-      "legacyOptionPageId": "EDE66829-7A36-4c5d-8E20-9290195DCF80"
+      "title": "@103;{13c3bbb4-f18f-4111-9f54-a0fb010d9194}"
     }
   }
 }

src/VisualStudio/CSharp/Impl/Options/IntelliSenseOptionPageControl.xaml.cs

@@ -283,26 +283,6 @@ Insert space before and after binary operators;</value>
     <value>Change formatting options for wrapping;leave block on single line;leave statements and member declarations on the same line</value>
     <comment>C# Formatting &gt; Wrapping options page keywords</comment>
   </data>
-  <data name="312" xml:space="preserve">
-    <value>Change completion list settings;Pre-select most recently used member; Completion Lists;
-Show completion list after a character is typed;
-Show completion list after a character is deleted;
-Automatically show completion list in argument lists (experimental);
-Highlight matching portions of completion list items;
-Show completion item filters;
-Automatically complete statement on semicolon;
-Snippets behavior;
-Never include snippets;
-Always include snippets;
-Include snippets when ?-Tab is typed after an identifier;
-Enter key behavior;
-Never add new line on enter;
-Only add new line on enter after end of fully typed word;
-Always add new line on enter;
-Show name suggestions;
-Show items from unimported namespaces (experimental);</value>
-    <comment>C# IntelliSense options page keywords</comment>
-  </data>
   <data name="107" xml:space="preserve">
     <value>Formatting</value>
     <comment>"Formatting" category node under Tools &gt; Options, Text Editor, C#, Code Style (no corresponding keywords)</comment>