Unused argument error using stopwords in R

Question

I am trying to clean and process post data from twitter. The initial corpus produces the following after cleaning: text_corpus[[1]]$content [1] "I actually would love if my Mad Scientist was drawn in a Gorillaz-style fanart..." text_corpus[[5]]$content [1] "I actually would love if my Mad Scientist was drawn in a Gorillaz-style fanart..."

When I process the text further I get this error:

Error in stopwords(kind = "SMART") : unused argument (kind = "SMART")

This is the code I use to remove stop words

  tm_map(content_transformer(tolower)) %>% 
  tm_map(removeNumbers) %>% 
  tm_map(removePunctuation) %>% 
  tm_map(removeWords, stopwords(kind = "SMART")) %>% 
  tm_map(stemDocument) %>% 
  tm_map(stripWhitespace)

Retrieving the content of the text_corpus after this results in the exact same text as above. Have I done something wrong? Is there anything else I can use to remove stopwords? Thanks