Revert "Add get_unsigned_int_option_default function"

This reverts commit 66e940f.

Author: TGWDB

src/util/options.cpp

@@ -54,16 +54,9 @@ signed int optionst::get_signed_int_option(const std::string &option) const
 }
 
 unsigned int optionst::get_unsigned_int_option(const std::string &option) const
-{
-  return get_unsigned_int_option_default(option, 0);
-}
-
-unsigned int optionst::get_unsigned_int_option_default(
-  const std::string &option,
-  unsigned int default_val) const
 {
   const std::string value=get_option(option);
-  return value.empty() ? default_val : safe_string2unsigned(value);
+  return value.empty()?0:safe_string2unsigned(value);
 }
 
 bool optionst::is_set(const std::string &option) const

src/util/options.h

@@ -29,9 +29,6 @@ class optionst
   bool get_bool_option(const std::string &option) const;
   signed int get_signed_int_option(const std::string &option) const;
   unsigned int get_unsigned_int_option(const std::string &option) const;
-  unsigned int get_unsigned_int_option_default(
-    const std::string &option,
-    unsigned int default_val) const;
   const value_listt &get_list_option(const std::string &option) const;
 
   /// N.B. opts.is_set("foo") does not imply opts.get_bool_option("foo")