remove clipboard functions

tests/testthat/test-clipboard.R

@@ -1,12 +0,0 @@
-context("clipboard.R")
-
-test_that("clipboard works", {
-  if (grepl(Sys.info()['sysname'], "windows", ignore.case = TRUE)) {
-    t1 <<- AMR::antibiotics # why is the <<- needed? Won't work without it...
-    clipboard_export(t1, info = FALSE)
-    t2 <- clipboard_import()
-    expect_equal(t1, t2)
-  } else {
-    expect_equal(TRUE, TRUE)
-  }
-})