[SYCL] Remove object format devicelib files (#21711) (#22134)
Cherry pick of
https://github.com/intel/llvm/commit/c7b0546c601c08e9d5238afe31d07ac23d4932a8
In https://github.com/intel/llvm/pull/21672, we removed .new.o format
devicelib file and use .bc format devicelib files for both new and old
offloading model driver. This PR removes .o format devicelib files since
they are not used in current pipeline either.
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Signed-off-by: jinge90 <ge.jin@intel.com>
Co-authored-by: jinge90 <ge.jin@intel.com>
