chore: clean up runtime flags and envs (#7454)

packages/frontend/web/project.json

@@ -50,12 +50,6 @@
         {
           "env": "CAPTCHA_SITE_KEY"
         },
-        {
-          "env": "SHOULD_REPORT_TRACE"
-        },
-        {
-          "env": "TRACE_REPORT_ENDPOINT"
-        },
         {
           "env": "R2_ACCOUNT_ID"
         },