ci: Drop nightly job that builds CMake with vendored curl on macOS

Revert commit 31884a7146 (ci: Add nightly job to build CMake with
vendored curl on macOS, 2024-05-09, v3.30.0-rc1~130^2).  After
curl 8.15.0 dropped support for the Secure Transport backend, we
rely on the curl provided by macOS to use the system certificate
store.

.gitlab-ci.yml

@@ -948,16 +948,6 @@ b:macos-arm64-ninja-symlinked:
     variables:
         CMAKE_CI_JOB_NIGHTLY: "true"
 
-b:macos-arm64-curl:
-    extends:
-        - .macos_arm64_curl
-        - .cmake_build_macos
-        - .cmake_build_artifacts
-        - .macos_arm64_tags
-        - .run_manually
-    variables:
-        CMAKE_CI_JOB_NIGHTLY: "true"
-
 b:macos-arm64-pch:
     extends:
         - .macos_arm64_pch
@@ -1005,17 +995,6 @@ t:macos-arm64-ninja-symlinked:
         CMAKE_CI_JOB_NIGHTLY: "true"
         CMAKE_CI_JOB_NIGHTLY_NINJA: "true"
 
-t:macos-arm64-curl:
-    extends:
-        - .macos_arm64_curl
-        - .cmake_test_macos
-        - .macos_arm64_tags
-        - .run_dependent
-    needs:
-        - b:macos-arm64-curl
-    variables:
-        CMAKE_CI_JOB_NIGHTLY: "true"
-
 b:macos-x86_64-makefiles:
     extends:
         - .macos_x86_64_makefiles

.gitlab/ci/configure_macos_arm64_curl.cmake

@@ -1,10 +0,0 @@
-# Build with our vendored curl instead of the default system version.
-set(CMAKE_USE_SYSTEM_CURL "OFF" CACHE BOOL "")
-
-set(CMake_TEST_TLS_VERIFY_URL "https://gitlab.kitware.com" CACHE STRING "")
-set(CMake_TEST_TLS_VERIFY_URL_BAD "https://badtls-expired.kitware.com" CACHE STRING "")
-set(CMake_TEST_TLS_VERSION "1.2" CACHE STRING "")
-set(CMake_TEST_TLS_VERSION_URL_BAD "https://badtls-v1-1.kitware.com:8011" CACHE STRING "")
-
-include("${CMAKE_CURRENT_LIST_DIR}/configure_macos_common.cmake")
-include("${CMAKE_CURRENT_LIST_DIR}/configure_common.cmake")

.gitlab/os-macos.yml

@@ -49,13 +49,6 @@
         CMAKE_CI_IN_SYMLINK_TREE: 1
         CMAKE_CI_BUILD_DIR: "real_work/work/build"
 
-.macos_arm64_curl:
-    extends: .macos_build
-
-    variables:
-        CMAKE_CONFIGURATION: macos_arm64_curl
-        CTEST_NO_WARNINGS_ALLOWED: 1
-
 .macos_arm64_pch:
     extends: .macos_arm64_ninja