diff --git a/runtime/hsa-runtime/README.md b/runtime/hsa-runtime/README.md
index 0ba67b07da..148caf2431 100644
--- a/runtime/hsa-runtime/README.md
+++ b/runtime/hsa-runtime/README.md
@@ -214,26 +214,6 @@ which implement HSA functionality for ROCm supported devices.
 * `hsa_system_get_extension_table` is not implemented for
   `HSA_EXTENSION_AMD_PROFILER`.
 
-## Environment Variables
-
-### HSA_ENABLE_SDMA
-Possible values:
-* 0:Disabled
-* 1:Enabled (Default Value)
-
-This will enable or disable the use of DMA engines in all copy directions (Host-to-Device, Device-to-Host, Device-to-Device) when using the following APIs:
-`hsa_memory_copy`, `hsa_amd_memory_fill`, `hsa_amd_memory_async_copy`, `hsa_amd_memory_async_copy_on_engine`
-
-### HSA_ENABLE_PEER_SDMA
-Possible values:
-* 0:Disabled
-* 1:Enabled (Default Value)
-
-This will enable or disable the use of DMA engines for Device-to-Device copies when using the following APIs:
-`hsa_memory_copy`, `hsa_amd_memory_async_copy`, `hsa_amd_memory_async_copy_on_engine`
-
-The value of `HSA_ENABLE_PEER_SDMA` is ignored if `HSA_ENABLE_SDMA` is used to disable the use of DMA engines.
-
 ## Disclaimer
 
 The information contained herein is for informational purposes only, and is