Remove and adjust tests based on release-3.6.3 branch

Author: WojciechMazur

community-build/test/scala/dotty/communitybuild/CommunityBuildTest.scala

@@ -95,7 +95,7 @@ class CommunityBuildTestC:
   @Test def sourcecode = projects.sourcecode.run()
   @Test def specs2 = projects.specs2.run()
 
-  @Test def stdLib213 = projects.stdLib213.run()
+  // @Test def stdLib213 = projects.stdLib213.run()
   @Test def ujson = projects.ujson.run()
   @Test def upickle = projects.upickle.run()
   @Test def utest = projects.utest.run()

tests/neg/i15474.check

@@ -23,7 +23,7 @@ object Test {
         """TypeRef(ThisType(TypeRef(NoPrefix(), "scala")), "Nothing"), """+
         """TypeRef(ThisType(TypeRef(NoPrefix(), "scala")), "Any"))), """+
         """MatchType("""+
-        """TypeRef(ThisType(TypeRef(NoPrefix(), "scala")), "Any"), """+ // match type bound
+        """TypeRef(TermRef(ThisType(TypeRef(NoPrefix(), "<root>")), "scala"), "Int"), """+ // match type bound
         """ParamRef(binder, 0), """+
         """List("""+
         """MatchCase("""+