Improve chart engine (#8253)

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* Update core.ts

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* #7361

* delete network chart

* federationChart強化 apRequestChart追加

* tweak

packages/backend/package.json

@@ -55,7 +55,6 @@
 		"@types/ratelimiter": "3.4.3",
 		"@types/redis": "4.0.11",
 		"@types/rename": "1.0.4",
-		"@types/request-stats": "3.0.0",
 		"@types/sanitize-html": "2.6.2",
 		"@types/seedrandom": "3.0.1",
 		"@types/sharp": "0.29.5",
@@ -144,7 +143,6 @@
 		"redis-lock": "0.1.4",
 		"reflect-metadata": "0.1.13",
 		"rename": "1.0.4",
-		"request-stats": "3.0.0",
 		"require-all": "3.0.0",
 		"rndstr": "1.0.0",
 		"s-age": "1.1.2",