Remove unneeded dependencies from requirements

mbeanz/requirements.txt

@@ -1,18 +1,2 @@
-enum34==1.0.4
-futures==3.0.3
-greenlet==0.4.7
-httpie==0.9.2
-msgpack-python==0.4.6
-neovim==0.0.37
-pep8==1.5.6
-powerline-status==2.1
-pyflakes==0.8.1
-Pygments==2.0.2
-pyzmq==14.1.1
 requests==2.7.0
-speedtest-cli==0.2.5
 subprocess32==3.2.6
-trollius==2.0
-vboxapi==1.0
-virtualenv==13.1.2
-wheel==0.24.0