Remove unused packages

package.json

@@ -41,21 +41,14 @@
     "@octokit/rest": "^16.37.0",
     "@primer/octicons": "^17.12.0",
     "@types/geojson": "7946.0.8",
-    "ajv": "^6.11.0",
     "apollo-angular": "^1.9.1",
     "apollo-angular-link-http": "^1.10.0",
     "apollo-cache-inmemory": "^1.6.0",
     "apollo-client": "^2.6.0",
     "apollo-link": "^1.2.14",
     "apollo-link-context": "^1.0.20",
-    "arcsecond": "^4.1.0",
     "core-js": "^3.28.0",
-    "d3": "^7.4.4",
-    "d3-time": "^3.0.0",
-    "d3-time-format": "^4.1.0",
-    "d3-timelines": "^1.3.1",
     "diff-match-patch": "^1.0.4",
-    "dompurify": "^2.4.4",
     "graphql": "^14.6.0",
     "graphql-tag": "2.11.0",
     "karma-spec-reporter": "0.0.32",
@@ -78,8 +71,6 @@
     "@graphql-codegen/typescript-operations": "^1.18.4",
     "@graphql-codegen/typescript-resolvers": "^1.20.0",
     "@octokit/graphql-schema": "^8.24.0",
-    "@types/d3": "^7.4.0",
-    "@types/dompurify": "^2.3.1",
     "@types/jasmine": "^3.8.2",
     "@types/jasminewd2": "2.0.8",
     "@types/node": "^14.17.6",