case 4707 - remove the stray cypress.json

Left over from 2020: it points at tests/e2e, removed in 2022 when the
end-to-end tests moved to the raven-test repo. Cypress is not a dependency
here and nothing refers to the file.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ayanova/cypress.json

@@ -1,9 +0,0 @@
-{
-  "pluginsFile": "tests/e2e/plugins/index.js",
-  "baseUrl": "http://localhost:7575",
-  "defaultCommandTimeout":10000,
-  "env": {
-    "adminusername": "superuser",
-    "adminpassword": "l3tm3in"
-  }
-}