Delete empty pi2ur.cpp (#12161)

This translation unit appears to be empty and unused as everything is
now in the header

Author: ldrumm

sycl/plugins/cuda/CMakeLists.txt

@@ -36,7 +36,6 @@ add_sycl_plugin(cuda
     ${UR_CUDA_ADAPTER_SOURCES}
     # Some code is shared with the UR adapter
     "../unified_runtime/pi2ur.hpp"
-    "../unified_runtime/pi2ur.cpp"
     "${sycl_inc_dir}/sycl/detail/pi.h"
     "${sycl_inc_dir}/sycl/detail/pi.hpp"
     "pi_cuda.hpp"

sycl/plugins/hip/CMakeLists.txt

@@ -98,7 +98,6 @@ add_sycl_plugin(hip
   SOURCES
     # Some code is shared with the UR adapter
     "../unified_runtime/pi2ur.hpp"
-    "../unified_runtime/pi2ur.cpp"
     ${UR_HIP_ADAPTER_SOURCES}
     "${sycl_inc_dir}/sycl/detail/pi.h"
     "${sycl_inc_dir}/sycl/detail/pi.hpp"

sycl/plugins/level_zero/CMakeLists.txt

@@ -77,7 +77,6 @@ add_sycl_plugin(level_zero
     #
     "ur_bindings.hpp"
     "../unified_runtime/pi2ur.hpp"
-    "../unified_runtime/pi2ur.cpp"
     ${UR_L0_ADAPTER_SOURCES}
     # Following are the PI Level-Zero Plugin only codes.
     "pi_level_zero.cpp"

sycl/plugins/native_cpu/CMakeLists.txt

@@ -9,7 +9,6 @@ add_sycl_plugin(native_cpu
     ${UR_NATIVE_CPU_ADAPTER_SOURCES}
     # Some code is shared with the UR adapter
     "../unified_runtime/pi2ur.hpp"
-    "../unified_runtime/pi2ur.cpp"
     "${sycl_inc_dir}/sycl/detail/pi.h"
     "${sycl_inc_dir}/sycl/detail/pi.hpp"
     "pi_native_cpu.cpp"

sycl/plugins/opencl/CMakeLists.txt

@@ -9,7 +9,6 @@ add_sycl_plugin(opencl
     ${UR_OPENCL_ADAPTER_SOURCES}
     # Some code is shared with the UR adapter
     "../unified_runtime/pi2ur.hpp"
-    "../unified_runtime/pi2ur.cpp"
     "${sycl_inc_dir}/sycl/detail/pi.h"
     "${sycl_inc_dir}/sycl/detail/pi.hpp"
     "pi_opencl.cpp"

sycl/plugins/unified_runtime/CMakeLists.txt

@@ -141,7 +141,6 @@ set(UNIFIED_RUNTIME_PLUGIN_ARGS
     # their "ur_bindings.hpp" files.
     "ur_bindings.hpp"
     "pi2ur.hpp"
-    "pi2ur.cpp"
     # These below belong to Unified Runtime PI Plugin only
     "pi_unified_runtime.hpp"
     "pi_unified_runtime.cpp"