Don't create "contact" terms in the database.

We never did export any interface to get at these, and when I went to
use these, I found them inadequate, (because I wanted to distinguish
address found in from: from those found in To:). Meanwhile, it was
easy enough to extract addresses with a search like:

	notmuch show tag:sent | grep ^To:

so the storage of contact terms was just wasting space. Stop that.

1 files changed, 0 insertions, 1 deletions

diff --git a/lib/database.cc b/lib/database.cc
index 6b7ad49d..4e49e53f 100644
--- a/lib/database.cc
+++ b/lib/database.cc
@@ -107,7 +107,6 @@ prefix_t BOOLEAN_PREFIX_INTERNAL[] = {
     { "ref", "XREFERENCE" },
     { "replyto", "XREPLYTO" },
     { "timestamp", "XTIMESTAMP" },
-    { "contact", "XCONTACT" }
 };
 
 prefix_t BOOLEAN_PREFIX_EXTERNAL[] = {