remove duplicate definition from mini-ops

Author: saitama951

src/mono/mono/mini/mini-ops.h

@@ -121,7 +121,6 @@ MINI_OP(OP_STORER8_MEMBASE_REG, "storer8_membase_reg", IREG, FREG, NONE)
 
 #if defined(TARGET_X86) || defined(TARGET_AMD64)
 MINI_OP(OP_STOREX_MEMBASE_REG, "storex_membase_reg", IREG, XREG, NONE)
-MINI_OP(OP_STOREX_ALIGNED_MEMBASE_REG,     "storex_aligned_membase_reg", IREG, XREG, NONE)
 MINI_OP(OP_STOREX_NTA_MEMBASE_REG,     "storex_nta_membase_reg", IREG, XREG, NONE)
 #endif