Update GIFs and simplify walkthrough

Author: savannahostrowski

media/walkthrough/configure.gif

@@ -249,15 +249,6 @@
               "altText": "CodeLens link above test client call"
             }
           },
-          {
-            "id": "configure",
-            "title": "Configure Your Project",
-            "description": "If the extension doesn't find your FastAPI app automatically, you can specify the entry point in settings.\n[Open Settings](command:workbench.action.openSettings?[\"fastapi.entryPoint\"])",
-            "media": {
-              "image": "media/walkthrough/configure.gif",
-              "altText": "FastAPI entry point configuration in VS Code settings"
-            }
-          },
           {
             "id": "cloud-deploy",
             "title": "Deploy to FastAPI Cloud",