verified error messages

Author: bishabosha

integration/failure/root-module-compile-error/src/RootModuleCompileErrorTests.scala

@@ -12,8 +12,6 @@ object RootModuleCompileErrorTests extends UtestIntegrationTestSuite {
 
       assert(!res.isSuccess)
 
-      throw new Exception("TODO: VERIFY THESE ERROR MESSAGES")
-
       locally {
         // For now these error messages still show generated/mangled code; not ideal, but it'll do
         assert(res.err.contains("""build.mill:6:50"""))