I just tried my single sensor code with those lines commented out, and I found that you are correct that they are unneeded. My two sensor circuit still doesn't work though. When using SPI.begin, I should still need to define additional Slave select pins right? Here is that chunk of code:
//*******Arduino MICRO SPI pins********
//#define SS 17
//#define SCK 15
//#define MOSI 16
//#define MISO 14
#define SS1 2
byte dataBuffer[8];
void setup() {
Serial.begin(9600);
SPI.begin;
//pinMode(SS, OUTPUT);
//pinMode(SCK, OUTPUT);
//pinMode(MOSI, OUTPUT);
//pinMode(MISO, INPUT);
pinMode(SS1, OUTPUT);
}