How to Remove State Abbreviations from a Choroplethr Map

I'm working with a choroplethr map like the one below. How do I simply remove the state abbreviations?

Here is the replication code:

library(choroplethr)
library(choroplethrMaps)

data(df_pop_state)
df_pop_state$value <- as.numeric(df_pop_state$value)

state_choropleth(df_pop_state, num_colors = 1,
                             title = "2012 State Population Estimates",
                             legend = "Population")

Thank you for using choroplethr. Note that Choroplethr uses R6 Objects. In fact, the state_choropleth function is just a convenience wrapper for the StateChoropleth R6 object:

> state_choropleth
function (df, title = "", legend = "", num_colors = 7, zoom = NULL, 
    reference_map = FALSE) 
{
    c = StateChoropleth$new(df)
    c$title = title
    c$legend = legend
    c$set_num_colors(num_colors)
    c$set_zoom(zoom)
    if (reference_map) {
        if (is.null(zoom)) {
            stop("Reference maps do not currently work with maps that have insets, such as maps of the 50 US States.")
        }
        c$render_with_reference_map()
    }
    else {
        c$render()
    }
}
<bytecode: 0x7fdda6aa3a10>
<environment: namespace:choroplethr>

If you look at the source code you will see that there is a field on the object that does what you want: show_labels. It defaults to TRUE.

We can get the result you want by simply creating your map using the StateChoropleth object (not the function) and setting show_labels to FALSE.

c = StateChoropleth$new(df_pop_state)
c$title = "2012 State Population Estimates"
c$legend = "Population"
c$set_num_colors(1)
c$show_labels = FALSE
c$render()

I chose this approach because, in general, I found that many functions in R have a large number of parameters, and that can be confusing. The downside is that functions are easier to document than objects (especially in R), so questions like this frequently come up.