remove community schema and test

Author: loynoir

src/schema-validation.jsonc

@@ -747,10 +747,6 @@
     "cargo-make.json": {
       "unknownKeywords": ["links"]
     },
-    "cargo.json": {
-      "externalSchema": ["base.json"],
-      "unknownFormat": ["uint32", "semver", "semver-requirement"]
-    },
     "cheatsheets.json": {
       "externalSchema": ["base.json"]
     },