Revert "golang: Don't run launch test if appliance has not been built."

This causes a strange error with modern golang:

  go: parsing $GOFLAGS: non-flag "appliance"

This reverts commit d57d8f2.

golang/Makefile.am

@@ -37,11 +37,6 @@ EXTRA_DIST = \
 
 if HAVE_GOLANG
 
-GOFLAGS =
-if ENABLE_APPLIANCE
-GOFLAGS += -tags appliance
-endif
-
 golangpkgdir = $(GOROOT)/pkg/$(GOOS)_$(GOARCH)/$(pkg)
 golangsrcdir = $(GOROOT)/src/pkg/$(pkg)
 
@@ -53,7 +48,7 @@ pkg/$(GOOS)_$(GOARCH)/$(pkg).a: src/$(pkg)/guestfs.go
 
 golangsrc_DATA = $(source_files)
 
-TESTS_ENVIRONMENT = pkg=$(pkg) GOFLAGS="$(GOFLAGS)" $(top_builddir)/run $(VG) # --test
+TESTS_ENVIRONMENT = pkg=$(pkg) $(top_builddir)/run $(VG) # --test
 
 TESTS = run-bindtests run-tests
 

golang/src/libguestfs.org/guestfs/guestfs_100_launch_test.go

@@ -1,5 +1,3 @@
-// +build appliance
-
 /* libguestfs Go tests
  * Copyright (C) 2013 Red Hat Inc.
  *