[3rdparty] Remove dlpack/libbactrace from 3rdparty

This PR removes the TVM dependency on dlpack and libbacktrace,
as tvm-ffi being separated to https://github.com/apache/tvm-ffi.

Author: MasterJH5574

.gitmodules

@@ -4,9 +4,6 @@
 [submodule "3rdparty/rang"]
 	path = 3rdparty/rang
 	url = https://github.com/agauniyal/rang.git
-[submodule "3rdparty/libbacktrace"]
-	path = ffi/3rdparty/libbacktrace
-	url = https://github.com/ianlancetaylor/libbacktrace
 [submodule "3rdparty/cutlass"]
 	path = 3rdparty/cutlass
 	url = https://github.com/NVIDIA/cutlass.git
@@ -25,9 +22,6 @@
 [submodule "3rdparty/zlib"]
 	path = 3rdparty/zlib
 	url = https://github.com/madler/zlib.git
-[submodule "ffi/3rdparty/dlpack"]
-	path = ffi/3rdparty/dlpack
-	url = https://github.com/dmlc/dlpack.git
 [submodule "3rdparty/tvm-ffi"]
 	path = 3rdparty/tvm-ffi
 	url = https://github.com/apache/tvm-ffi