Revert "feat(annotation): 添加模板示例数据配置功能"

This reverts commit a2b0fc3674.

runtime/datamate-python/app/module/annotation/schema/template.py

@@ -35,12 +35,7 @@ class TemplateConfiguration(BaseModel):
     labels: List[LabelDefinition] = Field(description="标签定义列表")
     objects: List[ObjectDefinition] = Field(description="对象定义列表")
     metadata: Optional[Dict[str, Any]] = Field(None, description="额外元数据")
-    example_data: Optional[Dict[str, str]] = Field(
-        None,
-        alias="exampleData",
-        description="示例数据，key 为变量名（不带$），value 为示例内容"
-    )
-
+    
     model_config = ConfigDict(populate_by_name=True)