Cleanup back-compat code for interpreting Run Service status codes (actions#3456)

Author: ericsciple

Diff for: src/Sdk/RSWebApi/RunServiceHttpClient.cs

@@ -107,15 +107,6 @@ public async Task<AgentJobRequestMessage> GetJobMessageAsync(
                 }
             }
 
-            // Temporary back compat
-            switch (result.StatusCode)
-            {
-                case HttpStatusCode.NotFound:
-                    throw new TaskOrchestrationJobNotFoundException($"Job message not found: {messageId}");
-                case HttpStatusCode.Conflict:
-                    throw new TaskOrchestrationJobAlreadyAcquiredException($"Job message already acquired: {messageId}");
-            }
-
             if (!string.IsNullOrEmpty(result.ErrorBody))
             {
                 throw new Exception($"Failed to get job message: {result.Error}. {Truncate(result.ErrorBody)}");
@@ -171,13 +162,6 @@ public async Task CompleteJobAsync(
                 }
             }
 
-            // Temporary back compat
-            switch (result.StatusCode)
-            {
-                case HttpStatusCode.NotFound:
-                    throw new TaskOrchestrationJobNotFoundException($"Job not found: {jobId}");
-            }
-
             if (!string.IsNullOrEmpty(result.ErrorBody))
             {
                 throw new Exception($"Failed to complete job: {result.Error}. {Truncate(result.ErrorBody)}");
@@ -225,13 +209,6 @@ public async Task<RenewJobResponse> RenewJobAsync(
                 }
             }
 
-            // Temporary back compat
-            switch (result.StatusCode)
-            {
-                case HttpStatusCode.NotFound:
-                    throw new TaskOrchestrationJobNotFoundException($"Job not found: {jobId}");
-            }
-
             if (!string.IsNullOrEmpty(result.ErrorBody))
             {
                 throw new Exception($"Failed to renew job: {result.Error}. {Truncate(result.ErrorBody)}");