remove old autogened bindings

lib/sparkmobile_bindings.dart

@@ -1,34 +0,0 @@
-// ignore_for_file: camel_case_types, non_constant_identifier_names, unused_element, unused_field, return_of_invalid_type, void_checks, annotate_overrides, no_leading_underscores_for_local_identifiers, library_private_types_in_public_api
-
-// AUTO GENERATED FILE, DO NOT EDIT.
-//
-// Generated by `package:ffigen`.
-// ignore_for_file: type=lint
-import 'dart:ffi' as ffi;
-
-/// Bindings for sparkmobile.
-class flutter_libsparkmobile {
-  /// Holds the symbol lookup function.
-  final ffi.Pointer<T> Function<T extends ffi.NativeType>(String symbolName)
-      _lookup;
-
-  /// The symbols are looked up in [dynamicLibrary].
-  flutter_libsparkmobile(ffi.DynamicLibrary dynamicLibrary)
-      : _lookup = dynamicLibrary.lookup;
-
-  /// The symbols are looked up with [lookup].
-  flutter_libsparkmobile.fromLookup(
-      ffi.Pointer<T> Function<T extends ffi.NativeType>(String symbolName)
-          lookup)
-      : _lookup = lookup;
-
-  ffi.Pointer<ffi.Char> generateSpendKey() {
-    return _generateSpendKey();
-  }
-
-  late final _generateSpendKeyPtr =
-      _lookup<ffi.NativeFunction<ffi.Pointer<ffi.Char> Function()>>(
-          'generateSpendKey');
-  late final _generateSpendKey =
-      _generateSpendKeyPtr.asFunction<ffi.Pointer<ffi.Char> Function()>();
-}