Remove obsolete .hgeol entry pointing to file moved elsewhere.

This kine was already replaced by
Lib/test/test_email/data/msg_26.txt = BIN
which is just below the last line in the patch context.

.hgeol

@@ -26,7 +26,6 @@
 **.xar  = BIN
 **.zip  = BIN
 
-Lib/email/test/data/msg_26.txt = BIN
 Lib/test/cjkencodings/* = BIN
 Lib/test/decimaltestdata/*.decTest = BIN
 Lib/test/sndhdrdata/sndhdr.* = BIN