dbi-table: No special handling for data.table::IDate

No longer needed post r-dbi#954

Author: detule

R/dbi-table.R

@@ -192,10 +192,6 @@ setMethod("sqlData", "OdbcConnection",
     is_POSIXlt <- vapply(value, function(x) is.object(x) && (is(x, "POSIXlt")), logical(1))
     value[is_POSIXlt] <- lapply(value[is_POSIXlt], as.POSIXct)
 
-    # Convert data.table::IDate to Date
-    is_IDate <- vapply(value, function(x) is.object(x) && (is(x, "IDate")), logical(1))
-    value[is_IDate] <- lapply(value[is_IDate], as.Date)
-
     # C code takes care of atomic vectors, dates, date times, and blobs just need to coerce other objects
     is_object <- vapply(value, function(x) is.object(x) && !(is(x, "POSIXct") || is(x, "Date") || is_blob(x) || is(x, "difftime")), logical(1))
     value[is_object] <- lapply(value[is_object], as.character)