[SPARK-10085] [MLLIB] [DOCS] removed unnecessary numpy array import

See https://issues.apache.org/jira/browse/SPARK-10085

Author: Piotr Migdal <pmigdal@gmail.com>

Closes #8284 from stared/spark-10085.

docs/mllib-linear-methods.md

@@ -504,7 +504,6 @@ will in the future.
 {% highlight python %}
 from pyspark.mllib.classification import LogisticRegressionWithLBFGS, LogisticRegressionModel
 from pyspark.mllib.regression import LabeledPoint
-from numpy import array
 
 # Load and parse the data
 def parsePoint(line):
@@ -676,7 +675,6 @@ Note that the Python API does not yet support model save/load but will in the fu
 
 {% highlight python %}
 from pyspark.mllib.regression import LabeledPoint, LinearRegressionWithSGD, LinearRegressionModel
-from numpy import array
 
 # Load and parse the data
 def parsePoint(line):