remove matplotlib from predict.py

recognize_digits/predict.py

@@ -11,8 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-"""Usage: predict.py -c CONF -d DATA  -m MODEL
-
+"""Usage: predict.py -c CONF -d DATA -m MODEL
 
 Arguments:
     CONF        train conf
@@ -29,7 +28,6 @@ Options:
 import os
 import sys
 from docopt import docopt
-import matplotlib.pyplot as plt
 import numpy as np
 
 from py_paddle import swig_paddle, DataProviderConverter