remove empty unit test.
remove empty unit test.

Endika/metabase,blueoceanideas/metabase,zoowii/metabase,dashkb/metabase,zoowii/metabase,Endika/metabase,zoowii/metabase,Endika/metabase,dashkb/metabase,dashkb/metabase,blueoceanideas/metabase,Endika/metabase,zoowii/metabase,dashkb/metabase,blueoceanideas/metabase,Endika/metabase,zoowii/metabase,dashkb/metabase,blueoceanideas/metabase,blueoceanideas/metabase