jsonUtil Optimize the definition of var (#80)

jsonUtil/json_to_struct.go

@@ -2,21 +2,11 @@ package jsonUtil
 
 import (
 	"encoding/json"
-	"errors"
 	"fmt"
 	"reflect"
 	"strings"
 )
 
-var (
-	// ErrPoint 不是指针类型
-	ErrPoint = errors.New("the argument to Result must be a non-nil pointer")
-	// ErrNotMap 不是Map类型
-	ErrNotMap = errors.New("cannot parse map, value is not a map")
-	// ErrNotSlice 不是Slice类型
-	ErrNotSlice = errors.New("cannot parse slice, value is not a slice")
-)
-
 // JsonToStruct converts JSON data to a Go structure.
 // Parameters:
 //