Revert "[flang][OpenMP] Skip runtime mapping with no offload targets (#144534)" (#145478)

And also revert 6ba1955 "[flang][OpenMP] Fix ignore-target-data.f90 test"

As it causes several bot failures
#144534 (comment)

Author: antmox

flang/test/Lower/OpenMP/ignore-target-data.f90

@@ -4378,9 +4378,6 @@ convertOmpTargetData(Operation *op, llvm::IRBuilderBase &builder,
   llvm::OpenMPIRBuilder *ompBuilder = moduleTranslation.getOpenMPBuilder();
   llvm::OpenMPIRBuilder::TargetDataInfo info(/*RequiresDevicePointerInfo=*/true,
                                              /*SeparateBeginEndCalls=*/true);
-  bool isTargetDevice = ompBuilder->Config.isTargetDevice();
-  bool isOffloadEntry =
-      isTargetDevice || !ompBuilder->Config.TargetTriples.empty();
 
   LogicalResult result =
       llvm::TypeSwitch<Operation *, LogicalResult>(op)
@@ -4470,9 +4467,6 @@ convertOmpTargetData(Operation *op, llvm::IRBuilderBase &builder,
 
   if (failed(result))
     return failure();
-  // Pretend we have IF(false) if we're not doing offload.
-  if (!isOffloadEntry)
-    ifCond = builder.getFalse();
 
   using InsertPointTy = llvm::OpenMPIRBuilder::InsertPointTy;
   MapInfoData mapData;