macOS: drop call to delocate-listdeps for speedup (#126)

delocate-listdeps is not required and can take a several minutes for
heavyweight wheels.

osx_utils.sh

@@ -317,12 +317,6 @@ function repair_wheelhouse {
     local wheelhouse=$1
 
     install_delocate
-
-    delocate-listdeps $wheelhouse/*.whl # lists library dependencies
-    # repair_wheelhouse can take more than 10 minutes without generating output
-    # but jobs that do not generate output within 10 minutes are aborted by travis-ci.
-    # Echoing something here solves the problem.
-    echo in repair_wheelhouse, executing delocate-wheel
     delocate-wheel $wheelhouse/*.whl # copies library dependencies into wheel
     # Add platform tags to label wheels as compatible with OSX 10.9 and
     # 10.10.  The wheels will be built against Python.org Python, and so will