remove unneeded environment variable
@@ -27,7 +27,6 @@ Currently, you need to build CuPy from source to run on AMD GPU.
::
$ export HCC_AMDGPU_TARGET=gfx900 # This value should be changed based on your GPU
- $ export __HIP_PLATFORM_HCC__
$ export CUPY_INSTALL_USE_HIP=1
$ pip install cupy
