unicode: free the map after a grace period

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/unicode/utf8-core.c",
                        "include/linux/unicode.h"
                    ],
                    "versions": [
                        {
                            "version": "b886ee3e778ec2ad43e276fd378ab492cf6819b7",
                            "lessThan": "2b54d3c971a1e5df3c9b0bcc10311ae6c29e79d8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b886ee3e778ec2ad43e276fd378ab492cf6819b7",
                            "lessThan": "6560c3d9a6925e3747d9ad8463e16010c31ba715",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b886ee3e778ec2ad43e276fd378ab492cf6819b7",
                            "lessThan": "a96c5299bd7305eb984377681eb3222a57376405",
                            "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/unicode/utf8-core.c",
                        "include/linux/unicode.h"
                    ],
                    "versions": [
                        {
                            "version": "5.2",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.2",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.59",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.13",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }