Remove an example file do not need [ci skip]

examples/my-freeze.txt

@@ -1,26 +0,0 @@
-#
-# This file is autogenerated by pip-compile
-# Make changes in dev-requirements.in, then run this to update:
-#
-#    pip-compile dev-requirements.in
-#
-apipkg==1.4               # via execnet
-autopep8==1.2.1
-click==6.2                # via pip-tools
-docutils==0.12
-execnet==1.4.1            # via pytest-cache
-first==2.0.1              # via pip-tools
-flask==0.10.1
-itsdangerous==0.24        # via flask
-jinja2==2.8               # via flask
-markupsafe==0.23          # via jinja2
-pep8==1.6.2               # via autopep8, pytest-pep8
-pip-tools==1.4.2
-py==1.4.31                # via pytest
-pytest-cache==1.0         # via pytest-pep8
-pytest-pep8==1.0.6
-pytest-pythonpath==0.7
-pytest==2.8.5             # via pytest-cache, pytest-pep8, pytest-pythonpath
-six==1.10.0               # via pip-tools
-werkzeug==0.11.2          # via flask
-wheel==0.26.0