configfs: unhash the dentry before dropping the item in rmdir

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/configfs/dir.c"
                    ],
                    "versions": [
                        {
                            "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa",
                            "lessThan": "b315d865660766d45ecdbf7433a4e3d36a554b3b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa",
                            "lessThan": "446720051d44eebaa81b33969173160057b73a33",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa",
                            "lessThan": "5d7cbfb65e47cc71d5d94d87d5d0d1679080f3eb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa",
                            "lessThan": "925d8564f1b2d9b46c5ab63b9bc942cea006da9b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7063fbf2261194f72ee75afca67b3b38b554b5fa",
                            "lessThan": "f06c2d26d1999d37e93299db0ecead04ca7d0b9f",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/configfs/dir.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.112",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.7",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }