Remove all vestiges of the old CDPx pipeline and old loc data (#15242)

This pull request removes build steps and localization files that we no longer need.

Related: #15243

src/settings-ui/Settings.UI/LocProject.json

@@ -1,14 +0,0 @@
-{
-    "Projects": [
-        {
-            "LanguageSet": "Azure_Languages",
-            "LocItems": [
-                {
-                    "SourceFile": "src\\settings-ui\\Settings.UI\\Strings\\en-us\\Resources.resw",
-                    "CopyOption": "LangIDOnName",
-                    "OutputPath": "src\\settings-ui\\Settings.UI\\Strings"
-                }
-            ]
-        }
-    ]
-}