Update/remove drushrc.php

[lmakarov]

example.drushrc.php for drush 8.x no longer lists the options we have been setting in /home/docker/.drush/drushrc.php since drush 6.

Specifically, this hack is not there:

service-cli/7.1/config/.drush/drushrc.php

Lines 307 to 319 in 9a12a7b

	/**
	* Load a drushrc file from the 'drush' folder at the root of the current
	* git repository. Example script below by Grayside. Customize as desired.
	* @see: http://grayside.org/node/93.
	*/
	$repo_dir = drush_get_option('root') ? drush_get_option('root') : getcwd();
	if (drush_shell_exec('cd %s && git rev-parse --show-toplevel 2> ' . drush_bit_bucket(), $repo_dir)) {
	$output = drush_shell_exec_output();
	$repo_top = $output[0];
	$options['config'] = $repo_top . '/drush/drushrc.php';
	$options['include'] = $repo_top . '/drush/commands';
	$options['alias-path'] = $repo_top . '/drush/aliases';
	}

It is used to detect the repo root and load drush settings from the top level drush folder in the repo.
It helps drush detect this folder when run from PROJECT_ROOT. Without the hack, drush has to be run from DOCROOT to properly detect a Drupal project root/etc.

As well as this option:

service-cli/7.1/config/.drush/drushrc.php

Line 153 in 9a12a7b

$options['dump-dir'] = '/tmp';

It may make sense to drop drushrc.php altogether, since these two configuration cases look to be deprecated at this point