Do not build the tracing shim.

Author: marcalff

MODULE.bazel

@@ -14,7 +14,20 @@ bazel_dep(name = "curl", version = "8.8.0")
 bazel_dep(name = "grpc", version = "1.69.0", repo_name = "com_github_grpc_grpc")
 bazel_dep(name = "nlohmann_json", version = "3.11.3", repo_name = "github_nlohmann_json")
 bazel_dep(name = "opentelemetry-proto", version = "1.5.0", repo_name = "com_github_opentelemetry_proto")
-bazel_dep(name = "opentracing-cpp", version = "1.6.0", repo_name = "com_github_opentracing")
+
+# In opentracing-cpp:
+# - file BUILD.bazel contains a rule generate_version_h, which invokes ... CMake.
+# - file CMakeLists.txt contains
+#  cmake_minimum_required(VERSION 3.1)
+# As a result, a BAZEL build requires CMake.
+# As of 2025-04-01, CMake 4.0.0 is installed in github runners
+# for Ubuntu 22 and Ubuntu 24.
+# CMake 4.0.0 no longer supports cmake_minimum_required < 3.5
+#
+# Removing opentracing-cpp from the build.
+#
+# bazel_dep(name = "opentracing-cpp", version = "1.6.0", repo_name = "com_github_opentracing")
+
 bazel_dep(name = "platforms", version = "0.0.8")
 bazel_dep(name = "prometheus-cpp", version = "1.3.0", repo_name = "com_github_jupp0r_prometheus_cpp")
 bazel_dep(name = "protobuf", version = "29.0", repo_name = "com_google_protobuf")