cleanup

src/pages/contribute/knowledgebase.astro

@@ -309,7 +309,6 @@ class KnowledgebaseForm {
 
   private handleFiles(files: File[]) {
     files.forEach(file => {
-      // Client-side validation before upload
       const validation = this.validateFileBeforeUpload(file);
       if (!validation.valid) {
         console.log('[UPLOAD]Cannot upload ', file.name, ' Error: ', validation.error);
@@ -340,7 +339,6 @@ class KnowledgebaseForm {
       };
     }
 
-    // Check file type
     const allowedExtensions = [
       '.pdf', '.doc', '.docx', '.txt', '.md', '.markdown', '.csv', '.json', 
       '.xml', '.html', '.rtf', '.yaml', '.yml', '.zip', '.tar', '.gz',