refactor(core): remove deprecated functionality and migrations (#1092)

* remove AttendanceMonth, AttendanceDay and all connected components and services
* remove migrations for old formats of note, children.schoolId, permissions, config service
* fix faker reference and remove unused npm packages

BREAKING CHANGE: removing deprecated migrations and entity models
closes #814

package.json

@@ -47,20 +47,16 @@
     "deep-object-diff": "^1.1.0",
     "faker": "^5.5.3",
     "flag-icon-css": "^3.5.0",
-    "idb": "^6.1.5",
     "json-query": "^2.2.2",
     "lodash": "^4.17.21",
     "md5": "^2.3.0",
     "moment": "^2.29.1",
-    "ngx-filter-pipe": "^2.1.2",
     "ngx-markdown": "^11.1.3",
     "ngx-papaparse": "^5.0.0",
     "pouchdb-adapter-memory": "^7.2.2",
     "pouchdb-browser": "^7.2.2",
     "reflect-metadata": "^0.1.13",
-    "reveal": "0.0.4",
     "rxjs": "^6.6.7",
-    "stream": "0.0.2",
     "tslib": "^2.3.1",
     "uuid": "^8.3.2",
     "webdav": "^4.7.0",