Don't install hstore--1.0.sql any more.

Since the current version is 1.1, the 1.0 file isn't really needed.  We do
need the 1.0--1.1 upgrade file, so people on 1.0 can upgrade.

Per recent discussion on pgsql-hackers.

contrib/hstore/Makefile

@@ -5,8 +5,7 @@ OBJS = hstore_io.o hstore_op.o hstore_gist.o hstore_gin.o hstore_compat.o \
 	crc32.o
 
 EXTENSION = hstore
-DATA = hstore--1.0.sql hstore--1.1.sql hstore--1.0--1.1.sql \
-	hstore--unpackaged--1.0.sql
+DATA = hstore--1.1.sql hstore--1.0--1.1.sql hstore--unpackaged--1.0.sql
 
 REGRESS = hstore