[JimBot] Remove CXP Attention (Azure#32291)

Removing config for the dead CXP Attention rule

Author: jsquire

.github/event-processor.config

@@ -2,7 +2,6 @@
   "InitialIssueTriage": "On",
   "ManualIssueTriage": "On",
   "ServiceAttention": "On",
-  "CXPAttention": "On",
   "ManualTriageAfterExternalAssignment": "On",
   "RequireAttentionForNonMilestone": "On",
   "AuthorFeedbackNeeded": "On",