Fix base exercises, remove one useless folder

tests/go/solutions/convertbase.go

@@ -20,3 +20,5 @@ func ConvertBase(nbr, baseFrom, baseTo string) string {
 
 	return resultFinal
 }
+
+// TODO: fix base exercises

tests/go/solutions/testConvertBase/main.go

@@ -1,11 +0,0 @@
-package main
-
-import (
-	"fmt"
-
-	correct "./correct"
-)
-
-func main() {
-	fmt.Println(correct.AtoiBase("111", "01"))
-}

tests/go/test_convertbase.go

@@ -39,3 +39,5 @@ func main() {
 		z01.Challenge("ConvertBase", student.ConvertBase, correct.ConvertBase, arg.nbr, arg.baseFrom, arg.baseTo)
 	}
 }
+
+// TODO: fix base exercises