Revert "HACK: cuart: Artificially extend WTIME by 100ms"

This reverts commit 41177fe0849d1858e777645e44d9120aac22732f.

Change-Id: I8532465305e9fb902cf1374f9823612773400691
diff --git a/ccid_common/cuart.c b/ccid_common/cuart.c
index ae9738b..c617754 100644
--- a/ccid_common/cuart.c
+++ b/ccid_common/cuart.c
@@ -80,9 +80,6 @@
 	/* limit lower wait time to reasonable value */
 	usecs = usecs < 300000 ? 300000 : usecs;
 
-	/* HACK: Some cards seem to take more time than specified? SO#4742 */
-	usecs += 100000;
-
 	if (usecs > 1000000) {
 		secs = usecs / 1000000;
 		usecs = usecs % 1000000;