diff --git a/numba/core/config.py b/numba/core/config.py
index a160044b25e..d746c22a8db 100644
--- a/numba/core/config.py
+++ b/numba/core/config.py
@@ -222,12 +222,6 @@ def optional_str(x):
         DUMP_SSA = _readenv("NUMBA_DUMP_SSA", int,
                             DEBUG_FRONTEND or DEBUG_TYPEINFER)
 
-        # Save intermediate files being generated by DPPL
-        SAVE_DPPL_IR_FILES = _readenv("NUMBA_SAVE_DPPL_IR_FILES", int, 0)
-
-        # Turn SPIRV-VALIDATION ON/OFF switch
-        SPIRV_VAL = _readenv("NUMBA_SPIRV_VAL", int, 0)
-
         # print debug info of analysis and optimization on array operations
         DEBUG_ARRAY_OPT = _readenv("NUMBA_DEBUG_ARRAY_OPT", int, 0)