tests/sitecustomize.py

import-checker: backout 40f79b9a2cc8 (issue4129)

This patch backs out 40f79b9a2cc8, which caused test-module-imports.t to
be skipped when the test was run using virtualenv.  Since the test now
passes when using virtualenv, the skip is no longer necessary.

try:
    import coverage
    getattr(coverage, 'process_startup', lambda: None)()
except ImportError:
    pass