gitbook: remove yandex webmaster validation

book.json

@@ -10,7 +10,7 @@
         "yametrika",
         "anchors",
         "validate-links",
-        "meta",
+        "bulk-redirect@https://github.com/okalachev/gitbook-plugin-bulk-redirect.git",
         "sitemap@https://github.com/okalachev/plugin-sitemap.git"
     ],
     "pluginsConfig": {
@@ -23,10 +23,6 @@
         },
         "sitemap": {
             "hostname": "https://clever.copterexpress.com"
-        },
-        "meta": {
-            "name": "yandex-verification",
-            "content": "e674d7f189fec3aa"
         }
     }
 }

docs/README.md

@@ -1,7 +0,0 @@
-<meta name="yandex-verification" content="e674d7f189fec3aa" />
-
-# Maintenance
-
-https://github.com/CopterExpress/clever/blob/master/docs/ru/SUMMARY.md
-
-https://github.com/CopterExpress/clever/blob/master/docs/en/SUMMARY.md