[UR][NFC] Remove unused function from v2 adapter #1600

Job	Run time
Detect Changes / Decide which tests could be affected by the changes	5s
Source Checks / source_checks (windows-2022)	9m 32s
Source Checks / source_checks (ubuntu-22.04)	10m 6s
MacOS build only (macos-13)	9m 54s
Adapters (OPENCL, UR_OPENCL, NATIVE_CPU, OPENCL:Intel(R) OpenCL) / Build & CTS (OPENCL, NATIVE_CPU, OPENCL:Intel(R) OpenCL, OFF, OFF, Release, gcc, g++)	3m 56s
Adapters (CUDA, UR_CUDA) / Build & CTS (CUDA, OFF, OFF, Release, gcc, g++)	2m 58s
Adapters (L0, UR_L0, ON) / Build & CTS (L0, ON, ON, Release, gcc, g++)	1m 43s
Adapters (L0, UR_L0, NATIVE_CPU) / Build & CTS (L0, NATIVE_CPU, OFF, OFF, Release, gcc, g++)	1m 49s
Adapters (NATIVE_CPU, UR_NATIVE_CPU) / Build & CTS (NATIVE_CPU, OFF, OFF, Release, gcc, g++)	1m 48s
Adapters (L0_V2, UR_L0) / Build & CTS (L0_V2, OFF, OFF, Release, gcc, g++)	1m 50s
Adapters (L0, UR_L0) / Build & CTS (L0, OFF, OFF, Release, gcc, g++)	2m 2s
Adapters (OPENCL, UR_OPENCL, Intel(R) OpenCL) / Build & CTS (OPENCL, Intel(R) OpenCL, OFF, OFF, Release, gcc, g++)	2m 57s
Adapters (HIP, UR_HIP) / Build & CTS (HIP, OFF, OFF, Release, gcc, g++)	6m 59s
	55m 39s

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