go.mod: remove replace and update github.com/gogo/googleapis v1.4.1

gogo/googleapis has a single dependency (github.com/gogo/protobuf), which is
currently the same version as we use, and we have a separate replace for that
dependency, so removing this override should not make a difference there.

gogo/googleapis v1.4.1 Includes updated protos with the gogo/protobuf fixes for
[CVE-2021-3121](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3121)

Change logs and diffs for each release:

- v1.3.3
  generate grpc service for google/longrunning/operations.proto
  full diff: https://github.com/gogo/googleapis/compare/v1.3.2...v1.3.3
- v1.4.0
  Add google geo type
  full diff: https://github.com/gogo/googleapis/compare/v1.3.3...v1.4.0
- v1.4.1
  This release contains sources generated with the version of gogo/protobuf
  containing a fix for the "skippy peanut butter" issue.
  full diff: https://github.com/gogo/googleapis/compare/v1.4.0...v1.4.1

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/github.com/gogo/googleapis/google/rpc/code.proto

@@ -1,4 +1,4 @@
-// Copyright 2017 Google Inc.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -22,7 +22,7 @@ option java_outer_classname = "CodeProto";
 option java_package = "com.google.rpc";
 option objc_class_prefix = "RPC";
 
-// The canonical error codes for Google APIs.
+// The canonical error codes for gRPC APIs.
 //
 //
 // Sometimes multiple error codes may apply.  Services should return
@@ -170,7 +170,8 @@ enum Code {
 
   // The service is currently unavailable.  This is most likely a
   // transient condition, which can be corrected by retrying with
-  // a backoff.
+  // a backoff. Note that it is not always safe to retry
+  // non-idempotent operations.
   //
   // See the guidelines above for deciding between `FAILED_PRECONDITION`,
   // `ABORTED`, and `UNAVAILABLE`.