core/vm: clear linter warnings (#17057)

* core/vm: clear linter warnings

* core/vm: review input

* core/vm.go: revert lint in noop as per request

core/vm/memory.go

@@ -29,6 +29,7 @@ type Memory struct {
 	lastGasCost uint64
 }
 
+// NewMemory returns a new memory memory model.
 func NewMemory() *Memory {
 	return &Memory{}
 }
@@ -107,6 +108,7 @@ func (m *Memory) Data() []byte {
 	return m.store
 }
 
+// Print dumps the content of the memory.
 func (m *Memory) Print() {
 	fmt.Printf("### mem %d bytes ###\n", len(m.store))
 	if len(m.store) > 0 {