x86: update read/write registers for transfer instructions (capstone-engine#2578)

Author: hainest

arch/X86/X86Mapping.c

@@ -1153,25 +1153,6 @@ void X86_get_insn_id(cs_struct *h, cs_insn *insn, unsigned int id)
 							break;
 					}
 					break;
-
-				case X86_INS_RET:
-					switch(h->mode) {
-						case CS_MODE_16:
-							insn->detail->regs_write[0] = X86_REG_SP;
-							insn->detail->regs_read[0] = X86_REG_SP;
-							break;
-						case CS_MODE_32:
-							insn->detail->regs_write[0] = X86_REG_ESP;
-							insn->detail->regs_read[0] = X86_REG_ESP;
-							break;
-						default:	// 64-bit
-							insn->detail->regs_write[0] = X86_REG_RSP;
-							insn->detail->regs_read[0] = X86_REG_RSP;
-							break;
-					}
-					insn->detail->regs_write_count = 1;
-					insn->detail->regs_read_count = 1;
-					break;
 			}
 
 			memcpy(insn->detail->groups, insns[i].groups, sizeof(insns[i].groups));