Hide compilation warnings and remove useless comments.

Mentions: #1

Author: virus-warnning

02_hello.py

@@ -1,4 +1,3 @@
-import os
 import numpy as np
 import pyopencl as cl
 
@@ -12,8 +11,6 @@ def main():
     }
     '''
 
-    os.environ['PYOPENCL_COMPILER_OUTPUT'] = '1'
-
     plf = [(cl.context_properties.PLATFORM, cl.get_platforms()[0])]
     ctx = cl.Context(dev_type=cl.device_type.GPU, properties=plf)
     prg = cl.Program(ctx, CL_CODE).build()

03_double.py

@@ -1,14 +1,3 @@
-# A precision test for 64-bits floating point value.
-#
-# It's the output on Intel i7 3667U + HD Graphics 4000.
-# The GPU doesn't support 64-bits floating point value.
-#
-#   Increase each items in array: [1. 2. 3.]
-#   Results of CPU: [2. 3. 4.]
-#   Results of GPU: [2.40000038e+001 5.26354425e-315 0.00000000e+000]
-#
-# See: https://stackoverflow.com/questions/11176990/opencl-floating-point-precision
-
 import numpy as np
 import pyopencl as cl
 

04_group.py

@@ -1,4 +1,3 @@
-import os
 import numpy as np
 import pyopencl as cl
 
@@ -16,8 +15,6 @@ def group_test(dev_type, gw_size, lw_size):
     lw_name = 'undefined' if lw_size == 0 else lw_size
     print('===== (device: {}, global work size: {}, local work size: {}) ====='.format(type_name, gw_size, lw_name))
 
-    os.environ['PYOPENCL_COMPILER_OUTPUT'] = '1'
-
     plf = [(cl.context_properties.PLATFORM, cl.get_platforms()[0])]
     ctx = cl.Context(dev_type=dev_type, properties=plf)
     prg = cl.Program(ctx, CL_CODE).build()

05_barrier.py

@@ -1,4 +1,3 @@
-import os
 import numpy as np
 import pyopencl as cl
 

08_image.py

@@ -1,4 +1,3 @@
-import os
 import numpy as np
 import pyopencl as cl
 from PIL import Image