Revert "transfer: add deprecation notice (#7372)" (#7402)

This reverts commit 05b61706.

plugins/transfer/README.md

 # `transfer` plugin
 
-**NOTICE: The `transfer` plugin is deprecated and will be removed soon, since the [transfer.sh](https://transfer.sh) service will be shutdown on 30th November 30th, 2018. Please move your files to an alternative file sharing service provider.**
-
-----
-
 [`transfer.sh`](https://transfer.sh) is an easy to use file sharing service from the command line
 
 ## Usage

plugins/transfer/transfer.plugin.zsh

@@ -12,14 +12,6 @@
 #   Modified to use tar command instead of zip
 #
 
-echo -ne '\e[1;33m'
-cat <<-EOF
-        [oh-my-zsh] WARNING: The 'transfer' plugin is deprecated and will be removed after
-        [oh-my-zsh] transfer.sh shuts down on November 30th. We suggest you stop using the
-        [oh-my-zsh] plugin and find an alternative file hosting service.
-EOF
-echo -ne '\e[0m'
-
 curl --version 2>&1 > /dev/null
 if [ $? -ne 0 ]; then
   echo "Could not find curl."