Im trying to remove the white bar on the right of this barplot, but i cannot understand how. Here is the graph:

Here is the code i used:
library(ggplot2)    
ggplot(data = df2, aes(x=`neighbourhood`, y="1", fill=`room_type`)                                                                    
 geom_bar(position="fill", stat="identity") +
 coord_flip() +
 scale_fill_brewer(palette = 14) +
 labs(title = "Tipi di stanze per quartiere", y = "Quantità", x = "Quartiere", fill = "Tipo di stanza")
 
     
    