refactor(frontend): remove unreachable barrel modules (#6205)

Co-authored-by: n0ctal <293235942+n0ctal@users.noreply.github.com>

frontend/src/schemas/index.ts

@@ -1,2 +0,0 @@
-export * from './primitives';
-export * from './protocols';

frontend/src/schemas/protocols/shared/index.ts

@@ -1,2 +0,0 @@
-export * from './shadowsocks';
-export * from './vmess';