Delete old x86 validator.

src/trusted/validator/x86/decoder/ncop_expr_node_kind.enum

Index: src/trusted/validator/x86/decoder/ncop_expr_node_kind.enum
diff --git a/src/trusted/validator/x86/decoder/ncop_expr_node_kind.enum b/src/trusted/validator/x86/decoder/ncop_expr_node_kind.enum
deleted file mode 100644
index 84c912de14272f444a4cfc25042610f8034a6c6e..0000000000000000000000000000000000000000
--- a/src/trusted/validator/x86/decoder/ncop_expr_node_kind.enum
+++ /dev/null
@@ -1,22 +0,0 @@
-# Kinds of nodes that can appear in the operand vector
-# Each line defines a separate type of expr node.
-
-# Unknown expression (typically denotes a problem).
-UndefinedExp
-# A register. Value is the corresponding OperandKind defining the
-# register.
-ExprRegister
-# An operand. Value is the index of the operand for the corresponding
-# opcode. Has one kid, which is the root of the translated operand.
-OperandReference
-# A constant. Value is the value of the constant.
-ExprConstant
-# A segment address.
-ExprSegmentAddress
-# A memory offset. Value is zero. Has four kids: base, index,
-# scale and disp, where the memory offset is:
-#    base + index(or undefined) * scale + disp
-ExprMemOffset
-# The argument isn't translated, but doesn't matter because
-# the instruction is not NaCl legal.
-ExprNaClIllegal