Remove deprecated device memory resource headers (#2151)

Removes deprecated device memory resources in `<rmm/mr/device/...>`. Users should use `<rmm/mr/...>` instead.

Closes #2141. Follows up on #2140.

Authors:
  - Bradley Dice (https://github.com/bdice)

Approvers:
  - Vyas Ramasubramani (https://github.com/vyasr)
  - Lawrence Mitchell (https://github.com/wence-)

URL: #2151

Author: bdice

cpp/CMakeLists.txt

@@ -37,7 +37,6 @@ option(BUILD_BENCHMARKS "Configure CMake to build (google) benchmarks" OFF)
 # This is mostly so that dependent libraries are configured in shared mode for downstream dependents
 # of RMM that get their common dependencies transitively.
 option(BUILD_SHARED_LIBS "Build RMM shared libraries" ON)
-option(RMM_DEPRECATE_MR_DEVICE_HEADERS "Enable deprecation warnings for rmm/mr/device/* headers" ON)
 set(RMM_LOGGING_LEVEL
     "INFO"
     CACHE STRING "Choose the logging level.")
@@ -48,7 +47,6 @@ message(VERBOSE "RMM: Build with NVTX support: ${RMM_NVTX}")
 # Set logging level. Must go before including gtests and benchmarks. Set the possible values of
 # build type for cmake-gui.
 message(STATUS "RMM: RMM_LOGGING_LEVEL = '${RMM_LOGGING_LEVEL}'")
-message(STATUS "RMM: Legacy rmm/mr/device headers deprecated: ${RMM_DEPRECATE_MR_DEVICE_HEADERS}")
 
 # cudart can be linked statically or dynamically
 option(CUDA_STATIC_RUNTIME "Statically link the CUDA runtime" OFF)
@@ -127,11 +125,6 @@ if(RMM_NVTX)
   target_compile_definitions(rmm PUBLIC RMM_NVTX)
 endif()
 
-# Control rmm/mr/device header deprecation warnings
-if(RMM_DEPRECATE_MR_DEVICE_HEADERS)
-  target_compile_definitions(rmm PUBLIC RMM_DEPRECATE_MR_DEVICE_HEADERS=1)
-endif()
-
 set(RMM_CXX_FLAGS -Wall -Werror -Wextra -Wno-unknown-pragmas -Wno-error=deprecated-declarations)
 set(RMM_CUDA_FLAGS -Werror=all-warnings
                    -Xcompiler=-Wall,-Werror,-Wextra,-Wno-error=deprecated-declarations)