code cleanup for arm_cpudetect.c

Change-Id: I5c49a983ced45197e1035fa5615d71b0bdad4109

vpx_ports/arm_cpudetect.c

@@ -53,8 +53,6 @@ int arm_cpu_caps(void) {
   return flags & mask;
 }
 
-#elif defined(_MSC_VER) /* end !CONFIG_RUNTIME_CPU_DETECT */
-
 #elif defined(_MSC_VER) /* end !CONFIG_RUNTIME_CPU_DETECT */
 /*For GetExceptionCode() and EXCEPTION_ILLEGAL_INSTRUCTION.*/
 #define WIN32_LEAN_AND_MEAN