Revert "Redis fault injection (#10784)" (#12371)

This reverts commit 048583b924e6c5c7812af56ec344ae210c168b3b.

Signed-off-by: FAYiEKcbD0XFqF2QK2E4viAHg8rMm2VbjYKdjTg <nflacco@lyft.com>

Mirrored from https://github.com/envoyproxy/envoy @ f521fc718780cda23e6f34669635494ea88890fc

envoy/extensions/filters/network/redis_proxy/v3/redis_proxy.proto

@@ -23,7 +23,7 @@ option (udpa.annotations.file_status).package_version_status = ACTIVE;
 // Redis Proxy :ref:`configuration overview <config_network_filters_redis_proxy>`.
 // [#extension: envoy.filters.network.redis_proxy]
 
-// [#next-free-field: 9]
+// [#next-free-field: 8]
 message RedisProxy {
   option (udpa.annotations.versioning).previous_message_type =
       "envoy.config.filter.network.redis_proxy.v2.RedisProxy";
@@ -183,31 +183,6 @@ message RedisProxy {
     Route catch_all_route = 4;
   }
 
-  // RedisFault defines faults used for fault injection.
-  message RedisFault {
-    enum RedisFaultType {
-      // Delays requests. This is the base fault; other faults can have delays added.
-      DELAY = 0;
-
-      // Returns errors on requests.
-      ERROR = 1;
-    }
-
-    // Fault type.
-    RedisFaultType fault_type = 1 [(validate.rules).enum = {defined_only: true}];
-
-    // Percentage of requests fault applies to.
-    config.core.v3.RuntimeFractionalPercent fault_enabled = 2
-        [(validate.rules).message = {required: true}];
-
-    // Delay for all faults. If not set, defaults to zero
-    google.protobuf.Duration delay = 3;
-
-    // Commands fault is restricted to, if any. If not set, fault applies to all commands
-    // other than auth and ping (due to special handling of those commands in Envoy).
-    repeated string commands = 4;
-  }
-
   reserved 2;
 
   reserved "cluster";
@@ -261,35 +236,6 @@ message RedisProxy {
   // AUTH, but no password is set" error will be returned.
   config.core.v3.DataSource downstream_auth_password = 6 [(udpa.annotations.sensitive) = true];
 
-  // List of faults to inject. Faults currently come in two flavors:
-  // - Delay, which delays a request.
-  // - Error, which responds to a request with an error. Errors can also have delays attached.
-  //
-  // Example:
-  //
-  // .. code-block:: yaml
-  //
-  //    faults:
-  //    - fault_type: ERROR
-  //      fault_enabled:
-  //        default_value:
-  //          numerator: 10
-  //          denominator: HUNDRED
-  //        runtime_key: "bogus_key"
-  //        commands:
-  //        - GET
-  //      - fault_type: DELAY
-  //        fault_enabled:
-  //          default_value:
-  //            numerator: 10
-  //            denominator: HUNDRED
-  //          runtime_key: "bogus_key"
-  //        delay: 2s
-  //
-  // See the :ref:`fault injection section
-  // <config_network_filters_redis_proxy_fault_injection>` for more information on how to configure this.
-  repeated RedisFault faults = 8;
-
   // If a username is provided an ACL style AUTH command will be required with a username and password.
   // Authenticate Redis client connections locally by forcing downstream clients to issue a `Redis
   // AUTH command <https://redis.io/commands/auth>`_ with this username and the *downstream_auth_password*