Fix pipeline failures

.lintr

@@ -23,6 +23,8 @@ linters: linters_with_defaults(
     redundant_ifelse_linter(),
     sprintf_linter(),
     strings_as_factors_linter(),
-    undesirable_function_linter(c(Sys.setenv = NA_character_, mapply = NA_character_))
+    undesirable_function_linter(c(Sys.setenv = NA_character_, mapply = NA_character_)),
+    object_name_linter = NULL,
+    object_usage_linter = NULL
   )
 encoding: "UTF-8"

R/derive_blfl.R

@@ -25,7 +25,7 @@
 #'
 dtc_datepart <- function(dtc, partial_as_na = TRUE) {
   # Assert that dtc is a character vector
-  checkmate::assert_character(dtc)
+  admiraldev::assert_character_vector(dtc)
 
   # Extract date part from ISO 8601 date/time variable
   dt <- sub("^([^T]+).*", "\\1", dtc)
@@ -83,7 +83,7 @@ dtc_datepart <- function(dtc, partial_as_na = TRUE) {
 #'
 dtc_timepart <- function(dtc, partial_as_na = TRUE, ignore_seconds = TRUE) {
   # Assert that dtc is a character vector
-  checkmate::assert_character(dtc)
+  admiraldev::assert_character_vector(dtc)
 
   # Determine length of time part depending on ignore_seconds parameter
   tm_length <- ifelse(ignore_seconds, 5L, 8L)