libre2.symbols: remove defunct operator== (thanks Tuncer Ayaz)

Fixes issue 38.

R=rsc
CC=re2-dev
http://codereview.appspot.com/4538065
diff --git a/libre2.symbols b/libre2.symbols
index 331765b..ad44900 100644
--- a/libre2.symbols
+++ b/libre2.symbols
@@ -6,8 +6,6 @@
 		# re2::StringPiece*
 		_ZN3re211StringPiece*;
 		_ZNK3re211StringPiece*;
-		# operator==(re2::StringPiece const&, re2::StringPiece const&)
-		_ZeqRKN3re211StringPieceES2_;
 		# operator<<(std::ostream&, re2::StringPiece const&)
 		_ZlsRSoRKN3re211StringPieceE;
 	local:
diff --git a/libre2.symbols.darwin b/libre2.symbols.darwin
index 3fcda99..842557b 100644
--- a/libre2.symbols.darwin
+++ b/libre2.symbols.darwin
@@ -5,7 +5,5 @@
 # re2::StringPiece*
 __ZN3re211StringPiece*
 __ZNK3re211StringPiece*
-# operator==(re2::StringPiece const&, re2::StringPiece const&)
-__ZeqRKN3re211StringPieceES2_
 # operator<<(std::ostream&, re2::StringPiece const&)
 __ZlsRSoRKN3re211StringPieceE