Remove stale CMake logic

Author: fpetrini15

CMakeLists.txt

@@ -137,15 +137,6 @@ if(TRITON_ONNXRUNTIME_LIB_PATHS STREQUAL "")
   set(TRITON_ONNXRUNTIME_DOCKER_BUILD ON)
 endif()
 
-set(RHEL_BUILD OFF)
-if(LINUX)
-  file(STRINGS "/etc/os-release" DISTRO_ID_LIKE REGEX "ID_LIKE")
-  if(${DISTRO_ID_LIKE} MATCHES "rhel|centos")
-    set(RHEL_BUILD ON)
-  endif(${DISTRO_ID_LIKE} MATCHES "rhel|centos")
-endif(LINUX)
-set(TRITON_CORE_HEADERS_ONLY OFF)
-
 message(STATUS "Using Onnxruntime docker: ${TRITON_ONNXRUNTIME_DOCKER_BUILD}")
 
 if(NOT TRITON_ONNXRUNTIME_DOCKER_BUILD)