code clean up

Author: YixingZhang007

sycl/test-e2e/lit.cfg.py

@@ -87,9 +87,6 @@
 if platform.system() == "Linux":
     config.available_features.add("linux")
     llvm_config.with_system_environment(["LD_LIBRARY_PATH", "LIBRARY_PATH", "CPATH"])
-    # llvm_config.with_environment(
-    #     "LD_LIBRARY_PATH", config.sycl_libs_dir, append_path=True
-    # )
 
 elif platform.system() == "Windows":
     config.available_features.add("windows")