[offload][l0][nfc] remove duplicated entry (#185855)

Remove left over function by mistake from #185404

offload/plugins-nextgen/level_zero/src/L0Plugin.cpp

@@ -271,11 +271,6 @@ Error LevelZeroPluginTy::asyncBarrierImpl(omp_interop_val_t *Interop) {
   return Plugin::success();
 }
 
-// We only need to check for formats other than ELF here
-Expected<bool> LevelZeroPluginTy::isImageCompatible(StringRef Image) const {
-  return identify_magic(Image) == file_magic::spirv_object;
-}
-
 } // namespace llvm::omp::target::plugin
 
 extern "C" {