runtime: remove unused cpuid_X variables

They are not exported and not used in the compiler or standard library.

Change-Id: Ie1d210464f826742d282f12258ed1792cbd2d188
Reviewed-on: https://go-review.googlesource.com/43135
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>

src/runtime/asm_386.s

@@ -76,8 +76,6 @@ notintel:
 	CPUID
 	MOVL	CX, DI // Move to global variable clobbers CX when generating PIC
 	MOVL	AX, runtime·processorVersionInfo(SB)
-	MOVL	DI, runtime·cpuid_ecx(SB)
-	MOVL	DX, runtime·cpuid_edx(SB)
 
 	// Check for MMX support
 	TESTL	$(1<<23), DX // MMX
@@ -116,7 +114,6 @@ eax7:
 	MOVL	$7, AX
 	MOVL	$0, CX
 	CPUID
-	MOVL	BX, runtime·cpuid_ebx7(SB)
 
 	TESTL	$(1<<3), BX // BMI1
 	SETNE	runtime·support_bmi1(SB)

src/runtime/asm_amd64.s

@@ -49,8 +49,6 @@ notintel:
 	MOVL	$1, AX
 	CPUID
 	MOVL	AX, runtime·processorVersionInfo(SB)
-	MOVL	CX, runtime·cpuid_ecx(SB)
-	MOVL	DX, runtime·cpuid_edx(SB)
 
 	TESTL	$(1<<26), DX // SSE2
 	SETNE	runtime·support_sse2(SB)
@@ -85,7 +83,6 @@ eax7:
 	MOVL	$7, AX
 	MOVL	$0, CX
 	CPUID
-	MOVL	BX, runtime·cpuid_ebx7(SB)
 
 	TESTL	$(1<<3), BX // BMI1
 	SETNE	runtime·support_bmi1(SB)

src/runtime/asm_amd64p32.s

@@ -46,8 +46,6 @@ notintel:
 	MOVL	$1, AX
 	CPUID
 	MOVL	AX, runtime·processorVersionInfo(SB)
-	MOVL	CX, runtime·cpuid_ecx(SB)
-	MOVL	DX, runtime·cpuid_edx(SB)
 
 	TESTL	$(1<<26), DX // SSE2
 	SETNE	runtime·support_sse2(SB)
@@ -82,7 +80,6 @@ eax7:
 	MOVL	$7, AX
 	MOVL	$0, CX
 	CPUID
-	MOVL	BX, runtime·cpuid_ebx7(SB)
 
 	TESTL	$(1<<3), BX // BMI1
 	SETNE	runtime·support_bmi1(SB)

src/runtime/runtime2.go

@@ -746,12 +746,6 @@ var (
 	support_sse42        bool
 	support_ssse3        bool
 
-	// TODO(moehrmann) delete below variables once external
-	// packages have their dependencies on these removed.
-	cpuid_ecx  uint32
-	cpuid_edx  uint32
-	cpuid_ebx7 uint32 // not set on amd64p32
-
 	goarm                uint8 // set by cmd/link on arm systems
 	framepointer_enabled bool  // set by cmd/link
 )