[breaking] Remove dense libsvm parser plugin.

.github/workflows/main.yml

@@ -29,7 +29,7 @@ jobs:
       run: |
         mkdir build
         cd build
-        cmake .. -DGOOGLE_TEST=ON -DUSE_OPENMP=ON -DUSE_DMLC_GTEST=ON -DPLUGIN_DENSE_PARSER=ON -GNinja -DBUILD_DEPRECATED_CLI=ON
+        cmake .. -DGOOGLE_TEST=ON -DUSE_OPENMP=ON -DUSE_DMLC_GTEST=ON -GNinja -DBUILD_DEPRECATED_CLI=ON
         ninja -v
     - name: Run gtest binary
       run: |

CMakeLists.txt

@@ -99,7 +99,6 @@ set(ENABLED_SANITIZERS "address" "leak" CACHE STRING
   "Semicolon separated list of sanitizer names. E.g 'address;leak'. Supported sanitizers are
 address, leak, undefined and thread.")
 ## Plugins
-option(PLUGIN_DENSE_PARSER "Build dense parser plugin" OFF)
 option(PLUGIN_RMM "Build with RAPIDS Memory Manager (RMM)" OFF)
 option(PLUGIN_FEDERATED "Build with Federated Learning" OFF)
 ## TODO: 1. Add check if DPC++ compiler is used for building
@@ -185,6 +184,9 @@ endif()
 if(USE_HDFS)
   message(SEND_ERROR "The option `USE_HDFS` has been removed from XGBoost")
 endif()
+if(PLUGIN_DENSE_PARSER)
+  message(SEND_ERROR "The option `PLUGIN_DENSE_PARSER` has been removed from XGBoost.")
+endif()
 
 #-- Sanitizer
 if(USE_SANITIZER)

plugin/CMakeLists.txt

@@ -1,7 +1,3 @@
-if(PLUGIN_DENSE_PARSER)
-  target_sources(objxgboost PRIVATE ${xgboost_SOURCE_DIR}/plugin/dense_parser/dense_libsvm.cc)
-endif()
-
 if(PLUGIN_UPDATER_ONEAPI)
   add_library(oneapi_plugin OBJECT
     ${xgboost_SOURCE_DIR}/plugin/updater_oneapi/regression_obj_oneapi.cc

plugin/README.md

@@ -36,5 +36,3 @@ The register macros available to plugin writers are:
 And from dmlc-core:
 
  - DMLC_REGISTER_PARAMETER - Register a set of parameter for a specific usecase
- - DMLC_REGISTER_DATA_PARSER - Register a data parser where the data can be
-   represented by a URL. This is used by DMatrix.

python-package/packager/build_config.py

@@ -17,14 +17,10 @@ class BuildConfiguration:  # pylint: disable=R0902
     use_nccl: bool = False
     # Whether to load nccl dynamically
     use_dlopen_nccl: bool = False
-    # Whether to enable HDFS
-    use_hdfs: bool = False
-    # Whether to enable Azure Storage
-    use_azure: bool = False
-    # Whether to enable AWS S3
-    use_s3: bool = False
-    # Whether to enable the dense parser plugin
-    plugin_dense_parser: bool = False
+    # Whether to enable federated learning
+    plugin_federated: bool = False
+    # Whether to enable rmm support
+    plugin_rmm: bool = False
     # Special option: See explanation below
     use_system_libxgboost: bool = False
 

tests/buildkite/build-cpu.sh

@@ -15,7 +15,7 @@ $command_wrapper rm -fv dmlc-core/include/dmlc/build_config_default.h
   # include/dmlc/build_config_default.h.
 echo "--- Build libxgboost from the source"
 $command_wrapper tests/ci_build/build_via_cmake.sh -DCMAKE_PREFIX_PATH=/opt/grpc \
-  -DPLUGIN_DENSE_PARSER=ON -DPLUGIN_FEDERATED=ON
+		 -DPLUGIN_FEDERATED=ON
 echo "--- Run Google Test"
 $command_wrapper bash -c "cd build && ctest --extra-verbose"
 echo "--- Stash XGBoost CLI executable"