Remove val io

Chisel projects no longer need -Xsource:2.11 when compiling with Scala
2.12.

Autowrapping of "val io" for compatibility mode Modules is now
implemented using reflection instead of calling the virtual method.

Also move Chisel.BlackBox to new chisel3.internal.LegacyBlackBox

1 files changed, 1 insertions, 2 deletions

diff --git a/build.sc b/build.sc
index 475d432d..c37b748b 100644
--- a/build.sc
+++ b/build.sc
@@ -59,8 +59,7 @@ trait CommonModule extends CrossSbtModule with PublishModule {
   override def scalacOptions = T {
     super.scalacOptions() ++ Agg(
       "-deprecation",
-      "-feature",
-      "-Xsource:2.11"
+      "-feature"
     )
   }