refactor(src): Replaces more pkg/errors usages with std lib.

Also update go.mod file

Signed-off-by: Moritz Huebner <moritz.huebner@tngtech.com>

src/go/README.md

@@ -74,24 +74,12 @@ client/server implementation. Tightly coupled with protobuf.
 
 Considered alternatives: Thrift, Swagger, JSON-RPC
 
-### github.com/pkg/errors
-
-BSD-2 license.
-
-Very lightweight library, does not have any transitive dependencies. A well-
-reasoned extension to built-in errors, this package provides stack tracing and
-error wrap/unwrapping. Some of this functionality was added to the built-in
-errors package as of Golang 1.13 (and this package influenced part of that
-design), but the built-in is lacking easy stack trace support.
-
-Considered alternatives: built-in errors, github.com/cockroachdb/errors
-
 ### Uber Zap
 
 MIT license.
 
 Medium weight, pulls in a few transitive dependencies, but has a large overlap
-with dependencies we also use (github.com/pkg/errors, testify). Provides
+with testify. Provides
 scoped/named loggers and parameterized logging while achieving better
 performance than other libraries proven via benchmarks.
 

src/go/crash/crash_test.go

@@ -12,13 +12,13 @@
 package crash_test
 
 import (
+	"errors"
 	"testing"
 	"time"
 
 	"github.com/golang/mock/gomock"
 	"github.com/magma/magma/src/go/crash"
 	mock_crash "github.com/magma/magma/src/go/crash/mock_crash"
-	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 )
 

src/go/go.mod

@@ -16,7 +16,6 @@ go 1.18
 require (
 	github.com/getsentry/sentry-go v0.11.0
 	github.com/golang/mock v1.6.0
-	github.com/pkg/errors v0.8.1
 	github.com/stretchr/testify v1.7.0
 	go.uber.org/zap v1.19.0
 	google.golang.org/grpc v1.40.0