[regexp] Remove unused code

src/js/regexp.js

Index: src/js/regexp.js
diff --git a/src/js/regexp.js b/src/js/regexp.js
deleted file mode 100644
index a82020961e8f6a1967220f661089cc33ca408087..0000000000000000000000000000000000000000
--- a/src/js/regexp.js
+++ /dev/null
@@ -1,105 +0,0 @@
-// Copyright 2012 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-(function(global, utils) {
-
-'use strict';
-
-%CheckIsBootstrapping();
-
-// -------------------------------------------------------------------
-
-// ES#sec-getsubstitution
-// GetSubstitution(matched, str, position, captures, replacement)
-// Expand the $-expressions in the string and return a new string with
-// the result.
-function GetSubstitution(matched, string, position, captures, replacement) {
-  var matchLength = matched.length;
-  var stringLength = string.length;
-  var capturesLength = captures.length;
-  var tailPos = position + matchLength;
-  var result = "";
-  var pos, expansion, peek, next, scaledIndex, advance, newScaledIndex;
-
-  var next = %StringIndexOf(replacement, '$', 0);
-  if (next < 0) {
-    result += replacement;
-    return result;
-  }
-
-  if (next > 0) result += %_SubString(replacement, 0, next);
-
-  while (true) {
-    expansion = '$';
-    pos = next + 1;
-    if (pos < replacement.length) {
-      peek = %_StringCharCodeAt(replacement, pos);
-      if (peek == 36) {         // $$
-        ++pos;
-        result += '$';
-      } else if (peek == 38) {  // $& - match
-        ++pos;
-        result += matched;
-      } else if (peek == 96) {  // $` - prefix
-        ++pos;
-        result += %_SubString(string, 0, position);
-      } else if (peek == 39) {  // $' - suffix
-        ++pos;
-        result += %_SubString(string, tailPos, stringLength);
-      } else if (peek >= 48 && peek <= 57) {
-        // Valid indices are $1 .. $9, $01 .. $09 and $10 .. $99
-        scaledIndex = (peek - 48);
-        advance = 1;
-        if (pos + 1 < replacement.length) {
-          next = %_StringCharCodeAt(replacement, pos + 1);
-          if (next >= 48 && next <= 57) {
-            newScaledIndex = scaledIndex * 10 + ((next - 48));
-            if (newScaledIndex < capturesLength) {
-              scaledIndex = newScaledIndex;
-              advance = 2;
-            }
-          }
-        }
-        if (scaledIndex != 0 && scaledIndex < capturesLength) {
-          var capture = captures.at(scaledIndex);
-          if (!IS_UNDEFINED(capture)) result += capture;
-          pos += advance;
-        } else {
-          result += '$';
-        }
-      } else {
-        result += '$';
-      }
-    } else {
-      result += '$';
-    }
-
-    // Go the the next $ in the replacement.
-    next = %StringIndexOf(replacement, '$', pos);
-
-    // Return if there are no more $ characters in the replacement. If we
-    // haven't reached the end, we need to append the suffix.
-    if (next < 0) {
-      if (pos < replacement.length) {
-        result += %_SubString(replacement, pos, replacement.length);
-      }
-      return result;
-    }
-
-    // Append substring between the previous and the next $ character.
-    if (next > pos) {
-      result += %_SubString(replacement, pos, next);
-    }
-  }
-  return result;
-}
-
-// -------------------------------------------------------------------
-// Exports
-
-utils.Export(function(to) {
-  to.GetSubstitution = GetSubstitution;
-});
-
-})