Delete enconding specs when reading file

Do not restrict input to UTF-8 format.

scripts/1_extract_metadata.R

@@ -145,7 +145,7 @@ read_data_sheet <- function(file, sheet) {
   # The first line is skipped. Otherwise the special place holder '$'
   # separating variable name and unit might get coerced to a '.'
   switch(file$extension,
-         "csv" = read.csv(file$path, header = FALSE, fileEncoding = "UTF-8-BOM"),
+         "csv" = read.csv(file$path, header = FALSE),
          "xlsx" = read.xlsx(file$path, sheet = sheet, colNames = FALSE)
   )
 }