The repack schema is contained in the pg_repack extension

...not the other way around. This allows DROP EXTENSION ... CASCADE to
remove temporary directories, simplifying the cleanup procedure after an
error, and getting rid of the schema on uninstall.

lib/Makefile

@@ -46,7 +46,6 @@ LIBS := $(filter-out -lxslt, $(LIBS))
 
 pg_repack.sql: pg_repack.sql.in
 	echo "BEGIN;\n" > $@; \
-	echo "CREATE SCHEMA repack;\n" >> $@; \
 	sed 's,MODULE_PATHNAME,$$libdir/$(MODULE_big),g' $< >> $@; \
 	echo "\nCOMMIT;" >> $@;