builtin provisioners are re-used and not Closed

builtin/provisioners/file/resource_provisioner.go

@@ -181,6 +181,5 @@ func (p *provisioner) Stop() error {
 }
 
 func (p *provisioner) Close() error {
-	p.cancel()
 	return nil
 }

builtin/provisioners/local-exec/resource_provisioner.go

@@ -181,7 +181,6 @@ func (p *provisioner) Stop() error {
 }
 
 func (p *provisioner) Close() error {
-	p.cancel()
 	return nil
 }
 

builtin/provisioners/remote-exec/resource_provisioner.go

@@ -116,7 +116,6 @@ func (p *provisioner) Stop() error {
 }
 
 func (p *provisioner) Close() error {
-	p.cancel()
 	return nil
 }