Remove orphaned apps/trust frontend

Compliance portal already embeds and serves the public SPA, so the
old @probo/trust app was unused. Drop its Makefile/CI stubs, Relay
project, CORS port, and the helper that only it imported.

Signed-off-by: Émile Ré <emile@probo.com>

relay.config.json

@@ -7,7 +7,6 @@
   "sources": {
     "apps/console/src/pages/iam": "iam",
     "apps/console/src": "core",
-    "apps/trust/src": "trust",
     "apps/compliance-portal/src": "complianceportal"
   },
   "projects": {
@@ -43,16 +42,6 @@
         "Map": "Record<string, string>"
       }
     },
-    "trust": {
-      "schema": "pkg/server/api/complianceportal/v1/schema.graphql",
-      "language": "typescript",
-      "noFutureProofEnums": true,
-      "customScalarTypes": {
-        "Datetime": "string",
-        "CursorKey": "string",
-        "EmailAddr": "string"
-      }
-    },
     "complianceportal": {
       "schema": "pkg/server/api/complianceportal/v1/schema.graphql",
       "language": "typescript",