minor changes to build env after 3 tier

.devcontainer/devcontainer.json

@@ -11,8 +11,4 @@
       ]
     }
   }
-}
-
-// Warning: Missing GLIBCXX >= 3.4.25! from 
-// Warning: Can't find libc.so or ldconfig, can't verify libc version
-// Warning: Missing GLIBC >= 2.28! from 
+}