chore: cleaned up warning message for always true, redundant check

internal/handlers/web/documents.go

@@ -416,10 +416,7 @@ func UploadDocumentsHandler(w http.ResponseWriter, r *http.Request) {
 				uploadDuration := time.Since(uploadStart)
 
 				// Get the actual size that was uploaded
-				var fileSize int64
+				fileSize := sizeTracker.Size()
-				if sizeTracker != nil {
-					fileSize = sizeTracker.Size()
-				}
 
 				// Verify the upload size matches the expected file size
 				sizeMatch := true