ci: Drop redundant job testing cuda12.2 with nvcc -ccbin=clang++-18

It has been superseded by an equivalent job with cuda12.6,
which does not need `--allow-unsupported-compiler`.

.gitlab-ci.yml

@@ -399,17 +399,6 @@ t:cuda12.2-nvidia:
     variables:
         CMAKE_CI_JOB_NIGHTLY: "true"
 
-t:cuda12.2-nvidia-clang:
-    extends:
-        - .cuda12.2_nvidia_clang
-        - .cmake_test_linux_release
-        - .linux_x86_64_tags_cuda
-        - .cmake_junit_artifacts
-        - .run_dependent
-        - .needs_centos7_x86_64
-    variables:
-        CMAKE_CI_JOB_NIGHTLY: "true"
-
 t:cuda12.2-clang:
     extends:
         - .cuda12.2_clang

.gitlab/ci/configure_cuda12.2_nvidia_clang.cmake

@@ -1 +0,0 @@
-include("${CMAKE_CURRENT_LIST_DIR}/configure_cuda12.2_nvidia_common.cmake")

.gitlab/ci/env_cuda12.2_nvidia_clang.sh

@@ -1,5 +0,0 @@
-export CC=/usr/bin/clang-18
-export CXX=/usr/bin/clang++-18
-export CUDACXX=/usr/local/cuda/bin/nvcc
-export CUDAHOSTCXX=/usr/bin/clang++-18
-export CUDAFLAGS=--allow-unsupported-compiler

.gitlab/os-linux.yml

@@ -402,12 +402,6 @@
         CMAKE_CONFIGURATION: cuda12.2_nvidia
         CTEST_NO_WARNINGS_ALLOWED: 1
 
-.cuda12.2_nvidia_clang:
-    extends: .cuda12.2
-    variables:
-        CMAKE_CONFIGURATION: cuda12.2_nvidia_clang
-        CTEST_NO_WARNINGS_ALLOWED: 1
-
 .cuda12.2_clang:
     extends: .cuda12.2
     variables: