diff --git a/src/runtime/asm_386.s b/src/runtime/asm_386.s
index 8b706f67063..806361b6b88 100644
--- a/src/runtime/asm_386.s
+++ b/src/runtime/asm_386.s
@@ -198,17 +198,11 @@ eax7:
 	MOVL	$0, CX
 	CPUID
 
-	TESTL	$(1<<3), BX // BMI1
-	SETNE	runtime·support_bmi1(SB)
-
 	// If OS support for XMM and YMM is not present
 	// support_avx2 will be set back to false later.
 	TESTL	$(1<<5), BX
 	SETNE	runtime·support_avx2(SB)
 
-	TESTL	$(1<<8), BX // BMI2
-	SETNE	runtime·support_bmi2(SB)
-
 	TESTL	$(1<<9), BX // ERMS
 	SETNE	runtime·support_erms(SB)
 
diff --git a/src/runtime/asm_amd64.s b/src/runtime/asm_amd64.s
index 16e9f5fe40c..db516b54929 100644
--- a/src/runtime/asm_amd64.s
+++ b/src/runtime/asm_amd64.s
@@ -161,17 +161,11 @@ eax7:
 	MOVL	$0, CX
 	CPUID
 
-	TESTL	$(1<<3), BX // BMI1
-	SETNE	runtime·support_bmi1(SB)
-
 	// If OS support for XMM and YMM is not present
 	// support_avx2 will be set back to false later.
 	TESTL	$(1<<5), BX
 	SETNE	runtime·support_avx2(SB)
 
-	TESTL	$(1<<8), BX // BMI2
-	SETNE	runtime·support_bmi2(SB)
-
 	TESTL	$(1<<9), BX // ERMS
 	SETNE	runtime·support_erms(SB)
 
diff --git a/src/runtime/asm_amd64p32.s b/src/runtime/asm_amd64p32.s
index 160dc556d46..04f78d8d938 100644
--- a/src/runtime/asm_amd64p32.s
+++ b/src/runtime/asm_amd64p32.s
@@ -81,17 +81,11 @@ eax7:
 	MOVL	$0, CX
 	CPUID
 
-	TESTL	$(1<<3), BX // BMI1
-	SETNE	runtime·support_bmi1(SB)
-
 	// If OS support for XMM and YMM is not present
 	// support_avx2 will be set back to false later.
 	TESTL	$(1<<5), BX
 	SETNE	runtime·support_avx2(SB)
 
-	TESTL	$(1<<8), BX // BMI2
-	SETNE	runtime·support_bmi2(SB)
-
 	TESTL	$(1<<9), BX // ERMS
 	SETNE	runtime·support_erms(SB)
 
diff --git a/src/runtime/runtime2.go b/src/runtime/runtime2.go
index 72a80a69077..ee5f6d5b47f 100644
--- a/src/runtime/runtime2.go
+++ b/src/runtime/runtime2.go
@@ -774,8 +774,6 @@ var (
 	support_aes          bool
 	support_avx          bool
 	support_avx2         bool
-	support_bmi1         bool
-	support_bmi2         bool
 	support_erms         bool
 	support_osxsave      bool
 	support_popcnt       bool