Clean up DPCTL_TARGET_HIP handling

Author: vlad-perevezentsev

CMakeLists.txt

@@ -80,24 +80,11 @@ if ("x${DPCTL_SYCL_TARGETS}" STREQUAL "x")
       else()
          set(_dpctl_sycl_targets "amdgcn-amd-amdhsa,spir64-unknown-unknown")
       endif()
-   else()
-      if (DEFINED ENV{DPCTL_TARGET_HIP})
-         set(_dpctl_amd_targets $ENV{DPCTL_TARGET_HIP})
-         if(_dpctl_sycl_targets)
-            set(_dpctl_sycl_targets "amdgcn-amd-amdhsa,${_dpctl_sycl_targets}")
-         else()
-            set(_dpctl_sycl_targets "amdgcn-amd-amdhsa,spir64-unknown-unknown")
-         endif()
-      endif()
    endif()
 else()
    set(_dpctl_sycl_targets ${DPCTL_SYCL_TARGETS})
    if (NOT "x${DPCTL_TARGET_HIP}" STREQUAL "x")
       set(_dpctl_amd_targets ${DPCTL_TARGET_HIP})
-   else()
-      if (DEFINED ENV{DPCTL_TARGET_HIP})
-         set(_dpctl_amd_targets $ENV{DPCTL_TARGET_HIP})
-      endif()
    endif()
 endif()