diff --git a/lib/matplotlib/axis.py b/lib/matplotlib/axis.py
index 23aa7e3a09af..bb822dbbda32 100644
--- a/lib/matplotlib/axis.py
+++ b/lib/matplotlib/axis.py
@@ -14,7 +14,6 @@
 from matplotlib.cbook import _string_to_bool
 import matplotlib.font_manager as font_manager
 import matplotlib.lines as mlines
-import matplotlib.patches as mpatches
 import matplotlib.scale as mscale
 import matplotlib.text as mtext
 import matplotlib.ticker as mticker
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
index f6f138f0fb38..f13d4e302dad 100644
--- a/lib/matplotlib/backend_bases.py
+++ b/lib/matplotlib/backend_bases.py
@@ -51,14 +51,13 @@
 from matplotlib.path import Path
 
 try:
-    from PIL import Image
     from PIL import PILLOW_VERSION
     from distutils.version import LooseVersion
     if LooseVersion(PILLOW_VERSION) >= "3.4":
         _has_pil = True
     else:
         _has_pil = False
-    del Image
+    del PILLOW_VERSION
 except ImportError:
     _has_pil = False
 
diff --git a/lib/matplotlib/backends/backend_qt5.py b/lib/matplotlib/backends/backend_qt5.py
index 8013245e9833..4a9744d6befe 100644
--- a/lib/matplotlib/backends/backend_qt5.py
+++ b/lib/matplotlib/backends/backend_qt5.py
@@ -14,7 +14,6 @@
     TimerBase, cursors, ToolContainerBase, StatusbarBase)
 import matplotlib.backends.qt_editor.figureoptions as figureoptions
 from matplotlib.backends.qt_editor.formsubplottool import UiSubplotTool
-from matplotlib.figure import Figure
 from matplotlib.backend_managers import ToolManager
 
 from .qt_compat import (
diff --git a/lib/matplotlib/cbook/deprecation.py b/lib/matplotlib/cbook/deprecation.py
index 43de50858cd5..4a968242bda8 100644
--- a/lib/matplotlib/cbook/deprecation.py
+++ b/lib/matplotlib/cbook/deprecation.py
@@ -1,6 +1,5 @@
 import functools
 import inspect
-import warnings
 
 
 class MatplotlibDeprecationWarning(UserWarning):
diff --git a/lib/matplotlib/dviread.py b/lib/matplotlib/dviread.py
index 5f6054079016..93fdbc677624 100644
--- a/lib/matplotlib/dviread.py
+++ b/lib/matplotlib/dviread.py
@@ -24,7 +24,6 @@
 import os
 import re
 import struct
-import subprocess
 import textwrap
 
 import numpy as np
diff --git a/lib/matplotlib/mlab.py b/lib/matplotlib/mlab.py
index 4009763fbcff..4b5c7c6e7105 100644
--- a/lib/matplotlib/mlab.py
+++ b/lib/matplotlib/mlab.py
@@ -60,7 +60,6 @@
 
 import matplotlib.cbook as cbook
 from matplotlib import docstring
-import math
 
 
 def window_hanning(x):
diff --git a/lib/mpl_toolkits/axisartist/axislines.py b/lib/mpl_toolkits/axisartist/axislines.py
index 521aece5d968..010758f75b3c 100644
--- a/lib/mpl_toolkits/axisartist/axislines.py
+++ b/lib/mpl_toolkits/axisartist/axislines.py
@@ -48,7 +48,6 @@
 import matplotlib.artist as martist
 import matplotlib.axes as maxes
 from matplotlib.path import Path
-from matplotlib.transforms import Bbox
 from .axisline_style import AxislineStyle
 from .axis_artist import AxisArtist, GridlinesCollection