Drop is.value() (#187)

Since it's never used and `evaluate()` doesn't produce an object of this type.

NAMESPACE

@@ -19,7 +19,6 @@ export(is.error)
 export(is.message)
 export(is.recordedplot)
 export(is.source)
-export(is.value)
 export(is.warning)
 export(new_output_handler)
 export(parse_all)

NEWS.md

@@ -1,5 +1,6 @@
 # evaluate (development version)
 
+* `is.value()` has been removed since it tests for an object that evaluate never creates.
 * `parse_all()` no longer has a default method, which will generate better errors if you pass in something unexpectected.
 * The package now depends on R 4.0.0 in order to decrease our maintenance burden.
 * `evaluate()` automatically strips calls from conditions emitted by top-level code (these incorrectly get calls because they're wrapped inside `eval()`) (#150).

R/evaluation.R

@@ -69,9 +69,6 @@ is.warning <- function(x) inherits(x, "warning")
 is.error <- function(x) inherits(x, "error")
 #' @rdname is.message
 #' @export
-is.value <- function(x) inherits(x, "value")
-#' @rdname is.message
-#' @export
 is.source <- function(x) inherits(x, "source")
 #' @rdname is.message
 #' @export