Remove obsolete experimental configuration code (#11427)

Author: michelleangela

Extension/package.json

@@ -3075,11 +3075,6 @@
                 "title": "%c_cpp.command.configurationEditUI.title%",
                 "category": "C/C++"
             },
-            {
-                "command": "C_Cpp.SelectDefaultCompiler",
-                "title": "%c_cpp.command.selectDefaultCompiler.title%",
-                "category": "C/C++"
-            },
             {
                 "command": "C_Cpp.SelectIntelliSenseConfiguration",
                 "title": "%c_cpp.command.selectIntelliSenseConfiguration.title%",
@@ -5707,10 +5702,6 @@
                     "command": "C_Cpp.referencesViewUngroupByType",
                     "when": "cpptools.hasReferencesResults"
                 },
-                {
-                    "command": "C_Cpp.SelectDefaultCompiler",
-                    "when": "never"
-                },
                 {
                     "command": "C_Cpp.InstallCompiler",
                     "when": "never"

Extension/package.nls.json

@@ -11,7 +11,6 @@
     "c_cpp.command.configurationProviderSelect.title": "Change Configuration Provider...",
     "c_cpp.command.configurationEditJSON.title": "Edit Configurations (JSON)",
     "c_cpp.command.configurationEditUI.title": "Edit Configurations (UI)",
-    "c_cpp.command.selectDefaultCompiler.title": "Select Default Compiler...",
     "c_cpp.command.selectIntelliSenseConfiguration.title": "Select IntelliSense Configuration...",
     "c_cpp.command.installCompiler.title": "Install a C++ Compiler",
     "c_cpp.command.rescanCompilers.title": "Rescan for Compilers",
@@ -977,9 +976,9 @@
     "c_cpp.walkthrough.description": "Dive into VS Code's rich C++ development experience.",
     "c_cpp.walkthrough.set.up.title": "Set up your C++ Environment",
     "c_cpp.walkthrough.activating.description": "Activating the C++ extension to determine whether your C++ Environment has been set up.\nActivating Extension...",
-    "c_cpp.walkthrough.no.compilers.windows.description": "We could not find a C++ compiler on your machine, which is required to use the C++ extension. Follow the instructions on the right to install one, then click “Find my new Compiler” below.\n[Find my new Compiler](command:C_Cpp.RescanCompilers?%7B%22sender%22%3A%22walkthrough%22%7D)",
-    "c_cpp.walkthrough.no.compilers.description": "We could not find a C++ compiler on your machine, which is required to use the C++ extension. Either select “Install a C++ Compiler” to have a compiler installed for you or follow the instructions on the right to install one, then click “Find my new Compiler” below.\n[Install a C++ Compiler](command:C_Cpp.InstallCompiler?%7B%22sender%22%3A%22walkthrough%22%7D)\n[Find my new Compiler](command:C_Cpp.RescanCompilers?%7B%22sender%22%3A%22walkthrough%22%7D)",
-    "c_cpp.walkthrough.compilers.found.description": "The C++ extension works with a C++ compiler. Select one from those already on your machine by clicking the button below.\n[Select my Default Compiler](command:C_Cpp.SelectDefaultCompiler?%7B%22sender%22%3A%22walkthrough%22%7D)",
+    "c_cpp.walkthrough.no.compilers.windows.description": "We could not find a C++ compiler on your machine, which is required to use the C++ extension. Follow the instructions on the right to install one, then click “Find my new Compiler” below.\n[Find my new Compiler](command:C_Cpp.RescanCompilers?%22walkthrough%22)",
+    "c_cpp.walkthrough.no.compilers.description": "We could not find a C++ compiler on your machine, which is required to use the C++ extension. Either select “Install a C++ Compiler” to have a compiler installed for you or follow the instructions on the right to install one, then click “Find my new Compiler” below.\n[Install a C++ Compiler](command:C_Cpp.InstallCompiler?%22walkthrough%22)\n[Find my new Compiler](command:C_Cpp.RescanCompilers?%22walkthrough%22)",
+    "c_cpp.walkthrough.compilers.found.description": "The C++ extension works with a C++ compiler. Select one from those already on your machine by clicking the button below.\n[Select my Default Compiler](command:C_Cpp.SelectIntelliSenseConfiguration?%22walkthrough%22)",
     "c_cpp.walkthrough.compilers.found.altText": "Image showing the select a default compiler quickpick and the list of compilers found on the users machine, one of which is selected.",
     "c_cpp.walkthrough.create.cpp.file.title": "Create a C++ file",
     "c_cpp.walkthrough.create.cpp.file.description": "[Open](command:toSide:workbench.action.files.openFile) or [create](command:toSide:workbench.action.files.newUntitledFile?%7B%22languageId%22%3A%22cpp%22%7D) a C++ file. Be sure to save it with the \".cpp\" extension, such as \"helloworld.cpp\". \n[Create a C++ File](command:toSide:workbench.action.files.newUntitledFile?%7B%22languageId%22%3A%22cpp%22%7D)",