删除无用代码并且新增流程图相关内容

utils/serializers.py

@@ -16,14 +16,6 @@ class LanguageNameChoiceField(serializers.CharField):
         return data
 
 
-class SPJLanguageNameChoiceField(serializers.CharField):
-    def to_internal_value(self, data):
-        data = super().to_internal_value(data)
-        if data and data not in SysOptions.spj_language_names:
-            raise InvalidLanguage(data)
-        return data
-
-
 class LanguageNameMultiChoiceField(serializers.ListField):
     def to_internal_value(self, data):
         data = super().to_internal_value(data)
@@ -31,12 +23,3 @@ class LanguageNameMultiChoiceField(serializers.ListField):
             if item not in SysOptions.language_names:
                 raise InvalidLanguage(item)
         return data
-
-
-class SPJLanguageNameMultiChoiceField(serializers.ListField):
-    def to_internal_value(self, data):
-        data = super().to_internal_value(data)
-        for item in data:
-            if item not in SysOptions.spj_language_names:
-                raise InvalidLanguage(item)
-        return data