diff --git a/.gitignore b/.gitignore
index bdd50c95..0a196185 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ count.out
 test
 profile.out
 tmp.out
+.idea/
\ No newline at end of file
diff --git a/render/json.go b/render/json.go
index 015c0dbb..41863093 100644
--- a/render/json.go
+++ b/render/json.go
@@ -41,9 +41,6 @@ type AsciiJSON struct {
 	Data interface{}
 }
 
-// SecureJSONPrefix is a string which represents SecureJSON prefix.
-type SecureJSONPrefix string
-
 // PureJSON contains the given interface object.
 type PureJSON struct {
 	Data interface{}