rm unnec modules

apps/app/src/features/openai/client/components/KnowledgeAssistant/KnowledgeAssistantManegementModal.module.scss

@@ -1,6 +1,4 @@
-@use '@growi/core-styles/scss/bootstrap/init' as bs;
 @use '@growi/core-styles/scss/variables/growi-official-colors';
-@use '@growi/ui/scss/atoms/btn-muted';
 
 // == Colors
 .grw-knowledge-assistant-manegement :global {