Merge pull request #24231 from fengyuentau:halide_cleanup_5.x

dnn: cleanup of halide backend for 5.x #24231

Merge with https://github.com/opencv/opencv_extra/pull/1092.

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [x] The feature is well documented and sample code can be built with the project CMake

cmake/OpenCVDetectHalide.cmake

@@ -1,47 +0,0 @@
-cmake_minimum_required(VERSION ${MIN_VER_CMAKE})
-
-if(" ${HALIDE_ROOT_DIR}" STREQUAL " ")
-  unset(HALIDE_ROOT_DIR CACHE)
-endif()
-ocv_check_environment_variables(HALIDE_ROOT_DIR)
-set(HALIDE_ROOT_DIR "${HALIDE_ROOT_DIR}" CACHE PATH "Halide root directory")
-
-if(NOT HAVE_HALIDE)
-  find_package(Halide QUIET) # Try CMake-based config files
-  if(Halide_FOUND)
-    if(TARGET Halide::Halide)  # modern Halide scripts defines imported target
-      set(HALIDE_INCLUDE_DIRS "")
-      set(HALIDE_LIBRARIES "Halide::Halide")
-      set(HAVE_HALIDE TRUE)
-    else()
-      # using HALIDE_INCLUDE_DIRS / Halide_LIBRARIES
-      set(HAVE_HALIDE TRUE)
-    endif()
-  endif()
-endif()
-
-if(NOT HAVE_HALIDE AND HALIDE_ROOT_DIR)
-  # Try manual search
-  find_library(HALIDE_LIBRARY
-      NAMES Halide
-      HINTS ${HALIDE_ROOT_DIR}/lib          # Unix
-      HINTS ${HALIDE_ROOT_DIR}/lib/Release  # Win32
-  )
-  find_path(HALIDE_INCLUDE_DIR
-      NAMES Halide.h HalideRuntime.h
-      HINTS ${HALIDE_ROOT_DIR}/include
-  )
-  if(HALIDE_LIBRARY AND HALIDE_INCLUDE_DIR)
-    # TODO try_compile
-    set(HALIDE_INCLUDE_DIRS "${HALIDE_INCLUDE_DIR}")
-    set(HALIDE_LIBRARIES "${HALIDE_LIBRARY}")
-    set(HAVE_HALIDE TRUE)
-  endif()
-endif()
-
-if(HAVE_HALIDE)
-  if(HALIDE_INCLUDE_DIRS)
-    include_directories(${HALIDE_INCLUDE_DIRS})
-  endif()
-  list(APPEND OPENCV_LINKER_LIBS ${HALIDE_LIBRARIES})
-endif()

cmake/templates/cvconfig.h.in

@@ -53,9 +53,6 @@
 /* Geospatial Data Abstraction Library */
 #cmakedefine HAVE_GDAL
 
-/* Halide support */
-#cmakedefine HAVE_HALIDE
-
 /* Vulkan support */
 #cmakedefine HAVE_VULKAN