Remove deprecated code

Makefile

@@ -29,7 +29,7 @@ test:
 
 staticcheck:
 	@printf $(COLOR) "Run static check..."
-	@go install honnef.co/go/tools/cmd/staticcheck@2022.1.3
+	@go install honnef.co/go/tools/cmd/staticcheck
 	@staticcheck ./...
 
 errcheck:
@@ -51,4 +51,3 @@ clean:
 	rm -rf bin
 
 ci-build: staticcheck errcheck workflowcheck bins test
-GO111MODULE=off go get -u honnef.co/go/tools/cmd/staticcheck

temporal-fixtures/largepayload/activities.go

@@ -2,7 +2,7 @@ package largepayload
 
 import (
 	"context"
-	"math/rand"
+	"crypto/rand"
 
 	"go.temporal.io/sdk/activity"
 )
@@ -19,8 +19,8 @@ func (a *Activities) CreateLargeResultActivity(ctx context.Context, sizeBytes in
 	logger.Info("Creating large result payload...", sizeBytes)
 
 	token := make([]byte, sizeBytes)
-	rand.Read(token)
-	return token, nil
+	_, err := rand.Read(token)
+	return token, err
 }
 
 func (a *Activities) ProcessLargeInputActivity(ctx context.Context, input []byte) error {

temporal-fixtures/largepayload/starter/main.go

@@ -2,8 +2,8 @@ package main
 
 import (
 	"context"
+	"crypto/rand"
 	"log"
-	"math/rand"
 	"strconv"
 
 	"github.com/pborman/uuid"
@@ -29,7 +29,7 @@ func main() {
 	id := uuid.New()[0:4]
 
 	memoToken := make([]byte, PayloadSize)
-	rand.Read(memoToken)
+	_, _ = rand.Read(memoToken)
 
 	i := 1
 	for i <= NumberOfWorkflows {