Remove outdated example project

...ftpm/xcode/xcshareddata/xcschemes/SessionFeature.xcscheme

...swiftpm/xcode/xcshareddata/xcschemes/example-app.xcscheme

Example/example-app/Package.swift

Example/example-app/Sources/AppFeature/App.swift

Example/example-app/Sources/AppFeature/AppFeature.swift

Example/example-app/Sources/AppFeature/AppView.swift

...ple-app/Sources/AppFeature/PasswordStorage+Keychain.swift

Example/example-app/Sources/ErrorFeature/ErrorFeature.swift

Example/example-app/Sources/ErrorFeature/ErrorView.swift

...e/example-app/Sources/LandingFeature/LandingFeature.swift

Example/example-app/Sources/LandingFeature/LandingView.swift

...pp/Sources/SessionFeature/NetworkFollowerStatusView.swift

...-app/Sources/SessionFeature/NetworkHealthStatusView.swift

...e/example-app/Sources/SessionFeature/SessionFeature.swift

Example/example-app/Sources/SessionFeature/SessionView.swift

...e/example-app/Tests/AppFeatureTests/AppFeatureTests.swift

...ample-app/Tests/ErrorFeatureTests/ErrorFeatureTests.swift

...e-app/Tests/LandingFeatureTests/LandingFeatureTests.swift

...e-app/Tests/SessionFeatureTests/SessionFeatureTests.swift