Remove duplicated method

moto/emr/utils.py

@@ -22,22 +22,6 @@ def random_instance_group_id(size=13):
     return "i-{0}".format(random_id())
 
 
-def tags_from_query_string(querystring_dict):
-    prefix = "Tags"
-    suffix = "Key"
-    response_values = {}
-    for key, value in querystring_dict.items():
-        if key.startswith(prefix) and key.endswith(suffix):
-            tag_index = key.replace(prefix + ".", "").replace("." + suffix, "")
-            tag_key = querystring_dict.get("Tags.{0}.Key".format(tag_index))[0]
-            tag_value_key = "Tags.{0}.Value".format(tag_index)
-            if tag_value_key in querystring_dict:
-                response_values[tag_key] = querystring_dict.get(tag_value_key)[0]
-            else:
-                response_values[tag_key] = None
-    return response_values
-
-
 def steps_from_query_string(querystring_dict):
     steps = []
     for step in querystring_dict: