Revert "Proxy read ids from redis (#7205)" (#7350)

This reverts commit dbac2d2c47.

## Problem

Proxy pods fails to install in k8s clusters, cplane release blocking.

## Summary of changes

Revert

proxy/src/context.rs

@@ -12,9 +12,7 @@ use crate::{
     console::messages::{ColdStartInfo, MetricsAuxInfo},
     error::ErrorKind,
     intern::{BranchIdInt, ProjectIdInt},
-    metrics::{
-        bool_to_str, LatencyTimer, ENDPOINT_ERRORS_BY_KIND, ERROR_BY_KIND, NUM_INVALID_ENDPOINTS,
-    },
+    metrics::{LatencyTimer, ENDPOINT_ERRORS_BY_KIND, ERROR_BY_KIND},
     DbName, EndpointId, RoleName,
 };
 
@@ -52,8 +50,6 @@ pub struct RequestMonitoring {
     // This sender is here to keep the request monitoring channel open while requests are taking place.
     sender: Option<mpsc::UnboundedSender<RequestData>>,
     pub latency_timer: LatencyTimer,
-    // Whether proxy decided that it's not a valid endpoint end rejected it before going to cplane.
-    rejected: bool,
 }
 
 #[derive(Clone, Debug)]
@@ -97,7 +93,6 @@ impl RequestMonitoring {
             error_kind: None,
             auth_method: None,
             success: false,
-            rejected: false,
             cold_start_info: ColdStartInfo::Unknown,
 
             sender: LOG_CHAN.get().and_then(|tx| tx.upgrade()),
@@ -118,10 +113,6 @@ impl RequestMonitoring {
         )
     }
 
-    pub fn set_rejected(&mut self, rejected: bool) {
-        self.rejected = rejected;
-    }
-
     pub fn set_cold_start_info(&mut self, info: ColdStartInfo) {
         self.cold_start_info = info;
         self.latency_timer.cold_start_info(info);
@@ -187,10 +178,6 @@ impl RequestMonitoring {
 
 impl Drop for RequestMonitoring {
     fn drop(&mut self) {
-        let outcome = if self.success { "success" } else { "failure" };
-        NUM_INVALID_ENDPOINTS
-            .with_label_values(&[self.protocol, bool_to_str(self.rejected), outcome])
-            .inc();
         if let Some(tx) = self.sender.take() {
             let _: Result<(), _> = tx.send(RequestData::from(&*self));
         }