Remove unused and broken rop.find_stack_adjustment (Gallopsled#2249)

* Added missing return to rop.find_stack_adjustment

* Removed ROP.find_stack_adjustment()

Author: fercevik729

pwnlib/rop/rop.py

@@ -1037,10 +1037,6 @@ def build(self, base = None, description = None):
 
         return stack
 
-
-    def find_stack_adjustment(self, slots):
-        self.search(move=slots * context.bytes)
-
     def chain(self, base=None):
         """Build the ROP chain