Merge pull request swiftlang#78276 from meg-gupta/removeossaerrorcp

[6.1] Remove diagnostic error for importing non ossa module to ossa module when EBM is not enabled

Author: meg-gupta

lib/Serialization/SerializedModuleLoader.cpp

@@ -1193,8 +1193,7 @@ void swift::serialization::diagnoseSerializedASTLoadFailure(
                        moduleBufferID);
     break;
   case serialization::Status::NotInOSSA:
-    if (Ctx.SerializationOpts.ExplicitModuleBuild ||
-        !Ctx.SILOpts.EnableRecompilationToOSSAModule) {
+    if (Ctx.SerializationOpts.ExplicitModuleBuild) {
       Ctx.Diags.diagnose(diagLoc,
                          diag::serialization_non_ossa_module_incompatible,
                          ModuleName);