rna-transcription: no-op declare compliance with problem-specificatio…

…ns 1.1.0

remove tests of invalid input

exercism/problem-specifications#1027
exercism/problem-specifications#1028

Note for the future: This commit makes the decision to keep the invalid input.
This decision is made arbitrarily, so there should be no hesitation
about reversing in the future if that is appropriate. It's merely a
desire to showcase Error. Even though that was already done in Hamming
and will be done in largest-series-product.

exercises/rna-transcription/source/rnatranscription/RNATest.ceylon

@@ -1,6 +1,7 @@
 import ceylon.test { ... }
 
-// Tests adapted from problem-specifications version 1.0.1
+// Tests adapted from problem-specifications version 1.1.0
+// The Ceylon track keeps the Error cases from 1.0.1 (removed in 1.1.0)
 {[String, String|Null]*} cases => {
   // empty strand
   ["",                         ""],