Remove special-casing of calls to RegExp test and exec methods with no argument.

src/regexp.js

Index: src/regexp.js
diff --git a/src/regexp.js b/src/regexp.js
index 0ab86f3338445e1394649f5e0597c2b1fb1cb8c2..f373ceb67e16bb98aeaf629d4d5161aab4279591 100644
--- a/src/regexp.js
+++ b/src/regexp.js
@@ -174,13 +174,6 @@ function RegExpExec(string) {
                         ['RegExp.prototype.exec', this]);
   }
 
-  if (%_ArgumentsLength() === 0) {
-    var regExpInput = LAST_INPUT(lastMatchInfo);
-    if (IS_UNDEFINED(regExpInput)) {
-      throw MakeError('no_input_to_regexp', [this]);
-    }
-    string = regExpInput;
-  }
   string = TO_STRING_INLINE(string);
   var lastIndex = this.lastIndex;
 
@@ -229,14 +222,6 @@ function RegExpTest(string) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['RegExp.prototype.test', this]);
   }
-  if (%_ArgumentsLength() == 0) {
-    var regExpInput = LAST_INPUT(lastMatchInfo);
-    if (IS_UNDEFINED(regExpInput)) {
-      throw MakeError('no_input_to_regexp', [this]);
-    }
-    string = regExpInput;
-  }
-
   string = TO_STRING_INLINE(string);
 
   var lastIndex = this.lastIndex;