Remove an ephemeral file from macOS example (#2716)
Nothing in macos/Flutter/ephemeral should be checked in; somehow this
file was included by accident.
diff --git a/packages/url_launcher/url_launcher/example/macos/Flutter/ephemeral/Flutter-Generated.xcconfig b/packages/url_launcher/url_launcher/example/macos/Flutter/ephemeral/Flutter-Generated.xcconfig
deleted file mode 100644
index 4d28f6f..0000000
--- a/packages/url_launcher/url_launcher/example/macos/Flutter/ephemeral/Flutter-Generated.xcconfig
+++ /dev/null
@@ -1,8 +0,0 @@
-// This is a generated file; do not edit or check into version control.
-FLUTTER_ROOT=/Users/franciscojma/Developer/flutter
-FLUTTER_APPLICATION_PATH=/Users/franciscojma/Developer/plugins/packages/url_launcher/url_launcher/example
-FLUTTER_TARGET=lib/main.dart
-FLUTTER_BUILD_DIR=build
-FLUTTER_FRAMEWORK_DIR=/Users/franciscojma/Developer/flutter/bin/cache/artifacts/engine/darwin-x64-release
-FLUTTER_BUILD_NAME=1.0.0
-FLUTTER_BUILD_NUMBER=1
