runtime: remove support_bmi{1,2}

The code reading these variables was removed in CL 41476. They are only
set but never read now, so remove them.

Change-Id: I6b0b8d813e9a3ec2a13586ff92746e00ad1b5bf0
Reviewed-on: https://go-review.googlesource.com/106095
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

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)
 

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)
 

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)
 

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