Fix a -Wcovered-switch-default warning in emitJumpTables.

src/IceCfg.cpp

Index: src/IceCfg.cpp
diff --git a/src/IceCfg.cpp b/src/IceCfg.cpp
index 9e5df996161e650feb98756426c9a52da4500109..ef49c155f615cb2ad1e2c2998aa1cb1f9f47bfa8 100644
--- a/src/IceCfg.cpp
+++ b/src/IceCfg.cpp
@@ -627,9 +627,6 @@ void Cfg::emitJumpTables() {
     for (const InstJumpTable *JumpTable : JumpTables)
       getTarget()->emitJumpTable(this, JumpTable);
   } break;
-  default:
-    llvm::report_fatal_error("Invalid out file type.");
-    break;
   }
 }