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

test/test262/test262.status

Index: test/test262/test262.status
diff --git a/test/test262/test262.status b/test/test262/test262.status
index c3d91bc2e064cc6a10f0872b5caf86f2dfc1a2ae..4a560ef92da98763d8adb78171e165adf0823b7d 100644
--- a/test/test262/test262.status
+++ b/test/test262/test262.status
@@ -29,7 +29,6 @@ prefix test262
 def FAIL_OK = FAIL, OKAY
 
 ############################### BUGS ###################################
-
 # '__proto__' should be treated as a normal property in JSON.
 S15.12.2_A1: FAIL
 
@@ -145,12 +144,6 @@ S15.8.2.16_A7: PASS || FAIL_OK
 S15.8.2.18_A7: PASS || FAIL_OK
 S15.8.2.13_A23: PASS || FAIL_OK
 
-# We allow calls to regexp exec() with no arguments to fail for
-# compatibility reasons.
-S15.10.6.2_A1_T16: FAIL_OK
-S15.10.6.2_A12: FAIL_OK
-S15.10.6.3_A1_T16: FAIL_OK
-
 # Sputnik tests (r97) assume RegExp.prototype is an Object, not a RegExp.
 S15.10.6_A2: FAIL_OK