fix: display the correct variable reference count when deleting a variable. (#8549)

core/variables.ts

@@ -747,7 +747,13 @@ export function deleteVariable(
   if ((triggeringBlock && uses.length) || uses.length > 1) {
     // Confirm before deleting multiple blocks.
     const confirmText = Msg['DELETE_VARIABLE_CONFIRMATION']
-      .replace('%1', String(uses.length + (triggeringBlock ? 1 : 0)))
+      .replace(
+        '%1',
+        String(
+          uses.length +
+            (triggeringBlock && !triggeringBlock.workspace.isFlyout ? 1 : 0),
+        ),
+      )
       .replace('%2', variableName);
     dialog.confirm(confirmText, (ok) => {
       if (ok && variable) {