KVM: x86 emulator: drop use_modrm_ea

Unused (and has never been).
Signed-off-by: Avi Kivity <avi@redhat.com>

arch/x86/include/asm/kvm_emulate.h

@@ -202,7 +202,6 @@ struct decode_cache {
 	u8 modrm_reg;
 	u8 modrm_rm;
 	u8 modrm_seg;
-	u8 use_modrm_ea;
 	bool rip_relative;
 	unsigned long modrm_ea;
 	void *modrm_ptr;

arch/x86/kvm/emulate.c

@@ -597,7 +597,6 @@ static int decode_modrm(struct x86_emulate_ctxt *ctxt,
 	c->modrm_reg |= (c->modrm & 0x38) >> 3;
 	c->modrm_rm |= (c->modrm & 0x07);
 	c->modrm_ea = 0;
-	c->use_modrm_ea = 1;
 	c->modrm_seg = VCPU_SREG_DS;
 
 	if (c->modrm_mod == 3) {