Revert "sources: Use make deps to vendor modules"

The "patch" the `Makefile` for `wal-g` makes to the third-party `lzo.go`
file just configures it to link statically with liblzo2.  This is
neither desirable nor necessary.

This reverts commit b8bd3583a7.

sources.sh

@@ -10,6 +10,6 @@ git clone \
 
 cd wal-g-${version}
 go mod tidy
-make deps USE_LZO=1
+go mod vendor
 cd ..
 tar -cf wal-g-${version}.tar.gz wal-g-${version}