Revert "Add 'labels:' config option"

This reverts commit 721327110d.

Signed-off-by: Aanand Prasad <aanand.prasad@gmail.com>

docs/install.md

@@ -10,7 +10,7 @@ Compose with a `curl` command.
 
 ### Install Docker
 
-First, install Docker version 1.6 or greater:
+First, install Docker version 1.3 or greater:
 
 - [Instructions for Mac OS X](http://docs.docker.com/installation/mac/)
 - [Instructions for Ubuntu](http://docs.docker.com/installation/ubuntulinux/)

docs/yml.md

@@ -253,24 +253,6 @@ db:
 > configuration options are **not** inherited - you will have to define
 > those manually each time you extend it.
 
-### labels
-
-Add metadata to containers using [Docker labels](http://docs.docker.com/userguide/labels-custom-metadata/). You can use either an array or a dictionary.
-
-It's recommended that you use reverse-DNS notation to prevent your labels from conflicting with those used by other software.
-
-```
-labels:
-  com.example.description: "Accounting webapp"
-  com.example.department: "Finance"
-  com.example.label-with-empty-value: ""
-
-labels:
-  - "com.example.description=Accounting webapp"
-  - "com.example.department=Finance"
-  - "com.example.label-with-empty-value"
-```
-
 ### net
 
 Networking mode. Use the same values as the docker client `--net` parameter.