Revert "do while loop"

This reverts commit 7c91a0bbb9.

speeduino.ino

@@ -772,8 +772,6 @@ void setup()
 }
 
 void loop() 
-{
-do
 {
       mainLoopCount++;    
       //Check for any requets from serial. Serial operations are checked under 2 scenarios:
@@ -1405,8 +1403,7 @@ do
       
     }
     
-  }while(1); //Some tests result this in a 1.2% faster at 8500RPM
-}  
+  }
   
 //************************************************************************************************
 //Interrupts