Fix flake8 'imported but unused' reports

$ flake8 | grep F401
./meson.py:17:1: F401 'mesonbuild.mesonlib' imported but unused
./meson.py:18:1: F401 'locale' imported but unused
./run_unittests.py:24:1: F401 'sys' imported but unused
./mesonbuild/minit.py:2:1: F401 'pyclbr.Function' imported but unused
./mesonbuild/minit.py:18:1: F401 'os' imported but unused
./mesonbuild/backend/vs2010backend.py:15:1: F401 'sys' imported but unused
./mesonbuild/backend/xcodebackend.py:19:1: F401 'sys' imported but unused
./mesonbuild/dependencies/ui.py:20:1: F401 'shutil' imported but unused
./mesonbuild/modules/python3.py:15:1: F401 'sys' imported but unused
./mesonbuild/modules/unstable_icestorm.py:15:1: F401 '..compilers' imported but unused
./mesonbuild/modules/unstable_icestorm.py:15:1: F401 '..mlog' imported but unused
./test cases/common/98 gen extra/srcgen3.py:3:1: F401 'os' imported but unused

1 files changed, 2 insertions, 2 deletions

diff --git a/meson.py b/meson.py
index 13bc870..abbac6f 100755
--- a/meson.py
+++ b/meson.py
@@ -14,8 +14,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from mesonbuild import mesonmain, mesonlib
-import sys, os, locale
+from mesonbuild import mesonmain
+import sys, os
 
 def main():
     # Always resolve the command path so Ninja can find it for regen, tests, etc.