[ROCm] remove unsupported archs from rocm triton flash-attention supported list (#17536)

Signed-off-by: Hongxia Yang <hongxia.yang@amd.com>

vllm/attention/ops/triton_flash_attention.py

@@ -650,7 +650,7 @@ def get_general_autotune_configs():
 
 
 def has_cdna_target():
-    ROCM_CDNA_TARGETS = ["gfx940", "gfx941", "gfx942", "gfx90a", "gfx908"]
+    ROCM_CDNA_TARGETS = ["gfx942", "gfx90a", "gfx908"]
     return triton.runtime.driver.active.get_current_target(
     ).arch in ROCM_CDNA_TARGETS