fasten.safety.gsn.devkit: clean the fasten.gsn.devkit by allowing onl…

…y minimal languages, the advanced languages will be provided by fasten.safety.gsn.ext.devkit

code/languages/com.mbeddr.formal.safety/devkits/fasten.safety.gsn/fasten.safety.gsn.devkit

@@ -1,9 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <dev-kit name="fasten.safety.gsn" uuid="b64463ba-ae31-4cf7-be7b-afc13cab4daa">
   <exported-language name="e8a04d94-4307-4f88-95a2-25f7c4f39437(com.mbeddr.formal.safety.gsn)" />
-  <exported-language name="6464626a-ab04-4051-908e-5e8dc75acd78(com.mbeddr.formal.safety.gsn.ext)" />
-  <exported-language name="f465db4c-63d4-40ef-afda-acd713dc19a1(com.mbeddr.formal.safety.gsn.patterns)" />
-  <exported-language name="2ec00dc3-d0e8-497d-8fe3-82d556eb83ba(com.mbeddr.formal.safety.gsn.req)" />
   <exported-language name="8ca79d43-eb45-4791-bdd4-0d6130ff895b(de.itemis.mps.editor.diagram.layout)" />
   <exported-language name="434b2bfb-bd7a-47c9-bced-b445035e6d96(com.mbeddr.formal.safety.req)" />
   <exported-language name="5e7ffa70-8e23-49f4-8c13-a887bba14c36(com.mbeddr.formal.safety.gsn.external_evidence)" />