Delete old x86 validator.

src/trusted/validator_x86/testdata/64/jump_reg_mismatch.test

-@hex:
-  # Models a jump where the mask and the jump registers don't match.
-  # and %ebx, $~0x1f
-  83 e3 e0
-  # add %rbx, %r15
-  4c 01 fb
-  # jmp %rax
-  ff e0
-@val:
-  VALIDATOR: 0000000000000006: ff e0                                        jmp %rax
-  VALIDATOR: ERROR: Invalid indirect jump
-  VALIDATOR: Checking jump targets: 0 to 8
-  VALIDATOR: Checking that basic blocks are aligned
-  *** <input> IS UNSAFE ***
-@rval:
-  VALIDATOR: 0000000000000006: ff e0                                        jmp %rax
-  VALIDATOR: ERROR: Invalid indirect jump
-  VALIDATOR: Checking jump targets: 0 to 8
-  VALIDATOR: Checking that basic blocks are aligned
-  *** <input> IS UNSAFE ***
-@rvald:
-  VALIDATOR: 0000000000000006: ff e0                                        jmp %rax
-  VALIDATOR: ERROR: Invalid indirect jump
-  VALIDATOR: Checking block alignment and jump targets: 0 to 8
-  *** <input> IS UNSAFE ***
-@vd-rval:
-  VALIDATOR: 0000000000000006: ff e0                                        [P] dontcarejump %rip (s), %rax (u)
-  VALIDATOR: ERROR: Invalid indirect jump
-  VALIDATOR: Checking jump targets: 0 to 8
-  VALIDATOR: Checking that basic blocks are aligned
-  *** <input> IS UNSAFE ***
-@dis:
-  0000000000000000: 83 e3 e0                                     and %ebx, 0xe0
-  0000000000000003: 4c 01 fb                                     add %rbx, %r15
-  0000000000000006: ff e0                                        jmp %rax
-@vdis:
-  0000000000000000: 83 e3 e0                                     and %ebx, 0xe0
-  0000000000000003: 4c 01 fb                                     add %rbx, %r15
-  0000000000000006: ff e0                                        [P] dontcarejump %rip (s), %rax (u)
-@rdfa_output:
-  6: [0] unrecognized instruction
-  return code: 1
-@validators_disagree:
-  errors reported by rdfa  but not old validator:
-    0x0 (both report 0x6).