Fix removed submodule (#3560)

.gitmodules

@@ -7,9 +7,6 @@
 [submodule "third_party/googletest"]
 	path = third_party/googletest
 	url = https://github.com/google/googletest.git
-[submodule "third_party/minigun"]
-	path = third_party/minigun
-	url = https://github.com/jermainewang/minigun.git
 [submodule "third_party/METIS"]
 	path = third_party/METIS
 	url = https://github.com/KarypisLab/METIS.git
@@ -20,9 +17,6 @@
 [submodule "third_party/phmap"]
 	path = third_party/phmap
 	url = https://github.com/greg7mdp/parallel-hashmap.git
-[submodule "third_party/thrust"]
-	path = third_party/thrust
-	url = https://github.com/NVIDIA/thrust.git
 [submodule "third_party/xbyak"]
 	path = third_party/xbyak
 	url = https://github.com/herumi/xbyak

CMakeLists.txt

@@ -54,7 +54,6 @@ if(USE_CUDA)
     #   is fixed by https://github.com/NVIDIA/cub/commit/9143e47e048641aa0e6ddfd645bcd54ff1059939
     #   in 11.1.
     message(STATUS "Detected CUDA of version ${CUDA_VERSION}. Use external CUB/Thrust library.")
-    cuda_include_directories(BEFORE "${CMAKE_SOURCE_DIR}/third_party/thrust")
     cuda_include_directories(BEFORE "${CMAKE_SOURCE_DIR}/third_party/cub")
   endif()
 endif(USE_CUDA)
@@ -202,8 +201,6 @@ endif(USE_CUDA)
 target_include_directories(dgl PRIVATE "include")
 target_include_directories(dgl PRIVATE "third_party/dlpack/include")
 target_include_directories(dgl PRIVATE "third_party/dmlc-core/include")
-target_include_directories(dgl PRIVATE "third_party/minigun/minigun")
-target_include_directories(dgl PRIVATE "third_party/minigun/third_party/moderngpu/src")
 target_include_directories(dgl PRIVATE "third_party/phmap/")
 target_include_directories(dgl PRIVATE "third_party/xbyak/")
 target_include_directories(dgl PRIVATE "third_party/METIS/include/")