remove search_tracks method
remove search_tracks method

git-svn-id: 241ade510acee2ba0e5f0bfaec02b997c9a134f7@125 ef99729e-6296-11de-9adf-53a34ab33f75

jdunck/pyechonest,jdunck/pyechonest,jdunck/pyechonest