build(deps): bump druid from 1.2.6 to 1.2.16

Bumps [druid](https://github.com/alibaba/druid) from 1.2.6 to 1.2.16.
- [Release notes](https://github.com/alibaba/druid/releases)
- [Commits](https://github.com/alibaba/druid/compare/1.2.6...1.2.16)

---
updated-dependencies:
- dependency-name: com.alibaba:druid
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -40,7 +40,7 @@
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>druid</artifactId>
-            <version>1.2.6</version>
+            <version>1.2.16</version>
         </dependency>
 
         <!--  lombok  -->

src/main/java/cn/celess/blog/controller/CategoryController.java

@@ -37,17 +37,6 @@ public class CategoryController {
         return Response.success(categoryService.delete(id));
     }
 
-    /**
-     * 删除一个分类
-     *
-     * @param id 分类id
-     * @return Response
-     */
-    @DeleteMapping("/admin/category/del/{id}")
-    public Response deleteOne(@PathVariable("id") long id) {
-        return Response.success(categoryService.delete(id));
-    }
-
     /**
      * 更新一个分类
      *