protein-translation: remove incorrect test (#2422)

The codon AAA maps to the amino acid lysine. While it is not listed
in the exercise instructions, users should be free to implement the
translation for all amino acids.

exercises/protein-translation/canonical-data.json

@@ -261,6 +261,7 @@
     },
     {
       "uuid": "9eac93f3-627a-4c90-8653-6d0a0595bc6f",
+      "reimplements": "1e75ea2a-f907-4994-ae5c-118632a1cb0f",
       "description": "Unknown amino acids, not part of a codon, can't translate",
       "comments": [
         "It's up to a track how to behave when a character is encountered ",