remove rocm option since switchchannel is not supported on rocm

Author: mahdiehghazim

examples/tutorials/05-switch-channel/Makefile

@@ -1,14 +1,7 @@
 CUDA_HOME ?= /usr/local/cuda
-ROCM_HOME ?= /opt/rocm
 
-# Check if nvcc exists, otherwise use hipcc
-ifeq ($(shell which $(CUDA_HOME)/bin/nvcc 2>/dev/null),)
-    COMPILER := $(ROCM_HOME)/bin/hipcc
-    ARCH_FLAG := -D__HIP_PLATFORM_AMD__=1
-else
-    COMPILER := $(CUDA_HOME)/bin/nvcc
-    ARCH_FLAG := -arch=native
-endif
+COMPILER := $(CUDA_HOME)/bin/nvcc
+ARCH_FLAG := -arch=native
 
 TARGET = bidir_switch_channel
 SRC = bidir_switch_channel.cu