[coll] Move the rabit poll helper. (#10349)

tests/ci_build/deploy_jvm_packages.sh

@@ -17,7 +17,7 @@ cd jvm-packages
 rm -rf $(find . -name target)
 rm -rf ../build/
 
-# Re-build package without Mock Rabit
+# Re-build package
 # Maven profiles:
 # `default`           includes modules: xgboost4j, xgboost4j-spark, xgboost4j-flink, xgboost4j-example
 # `gpu`               includes modules: xgboost4j-gpu, xgboost4j-spark-gpu, sets `use.cuda = ON`

tests/ci_build/test_r_package.py

@@ -50,10 +50,6 @@ def pack_rpackage() -> Path:
     shutil.copytree("src", dest / "src" / "src")
     shutil.copytree("include", dest / "src" / "include")
     shutil.copytree("amalgamation", dest / "src" / "amalgamation")
-    # rabit
-    rabit = Path("rabit")
-    os.mkdir(dest / "src" / rabit)
-    shutil.copytree(rabit / "include", dest / "src" / "rabit" / "include")
     # dmlc-core
     dmlc_core = Path("dmlc-core")
     os.mkdir(dest / "src" / dmlc_core)

tests/ci_build/tidy.py

@@ -192,8 +192,7 @@ class ClangTidy(object):
         def should_lint(path):
             if not self.cpp_lint and path.endswith('.cc'):
                 return False
-            isxgb = path.find('rabit') == -1
-            isxgb = isxgb and path.find('dmlc-core') == -1
+            isxgb = path.find('dmlc-core') == -1
             isxgb = isxgb and (not path.startswith(self.cdb_path))
             if isxgb:
                 print(path)

tests/cpp/CMakeLists.txt

@@ -25,8 +25,7 @@ if(PLUGIN_SYCL)
     PRIVATE
     ${gtest_SOURCE_DIR}/include
     ${xgboost_SOURCE_DIR}/include
-    ${xgboost_SOURCE_DIR}/dmlc-core/include
-    ${xgboost_SOURCE_DIR}/rabit/include)
+    ${xgboost_SOURCE_DIR}/dmlc-core/include)
 
   target_compile_definitions(plugin_sycl_test PUBLIC -DXGBOOST_USE_SYCL=1)
   target_link_libraries(plugin_sycl_test PUBLIC -fsycl)
@@ -66,8 +65,7 @@ target_include_directories(testxgboost
   PRIVATE
   ${GTEST_INCLUDE_DIRS}
   ${xgboost_SOURCE_DIR}/include
-  ${xgboost_SOURCE_DIR}/dmlc-core/include
-  ${xgboost_SOURCE_DIR}/rabit/include)
+  ${xgboost_SOURCE_DIR}/dmlc-core/include)
 target_link_libraries(testxgboost
   PRIVATE
   GTest::gtest GTest::gmock)