Revert "feat(dart_frog_gen): add route configuration validation to gen (#614)" (#628)

This reverts commit de88080.

Author: renancaraujo

.gitignore

@@ -1,3 +1,2 @@
 .idea
-.vscode/settings.json
-.DS_Store
+.vscode/settings.json

packages/dart_frog_gen/lib/dart_frog_gen.dart

@@ -2,4 +2,3 @@
 library dart_frog_gen;
 
 export 'src/build_route_configuration.dart';
-export 'src/validate_route_configuration/validate_route_configuration.dart';

packages/dart_frog_gen/lib/src/validate_route_configuration/external_path_dependencies.dart

@@ -11,7 +11,6 @@ environment:
 
 dependencies:
   path: ^1.8.1
-  pubspec_parse: ^1.2.2
 
 dev_dependencies:
   mocktail: ^0.3.0