Remove unused method.

Mobile Buy SDK/Mobile Buy SDK/Additions/NSDecimalNumber+BUYAdditions.h

@@ -29,15 +29,6 @@
 @interface NSDecimalNumber (BUYAdditions)
 
 /**
- *  Converts a string into an NSDecimalNumber or zero (if nil or not a number)
- *
- *  @param string The string to convert
- *
- *  @return NSDecimalNumber from a string
- */
-+ (NSDecimalNumber*)buy_decimalNumberOrZeroWithString:(NSString*)string;
-
-/**
  *  Converts a JSON value to an NSDecimalNumber
  *
  *  @param valueFromJSON The value to convert

Mobile Buy SDK/Mobile Buy SDK/Additions/NSDecimalNumber+BUYAdditions.m

@@ -32,11 +32,6 @@
 
 @implementation NSDecimalNumber (BUYAdditions)
 
-+ (NSDecimalNumber*)buy_decimalNumberOrZeroWithString:(NSString*)string
-{
-	return string.length ? string.decimalNumber : [NSDecimalNumber zero];
-}
-
 + (NSDecimalNumber*)buy_decimalNumberFromJSON:(id)valueFromJSON
 {
 	static NSDecimalNumberHandler *numberHandler;