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You can remove the e_line labels in echarts4r by setting the show property to FALSE in the label argument of the e_line function. Here is an example:

library(echarts4r)

# example data
df <- data.frame(x = 1:5, y = c(2, 4, 5, 3, 6))

# plot with e_line and no labels
df %>%
  e_charts(x) %>%
  e_line(y, label = list(show = FALSE))

In this example, the show property in the label argument is set to FALSE, which hides the labels for the e_line.