Fixed up undefined variable noise

reedy@tin:/a/common$ ./multiversion/deleteMediaWiki php-1.22wmf10

Deleting symlink files for MediaWiki install at /a/common/php-1.22wmf10...

Symlink file removed: /a/common/docroot/bits/static-1.22wmf10/skins
Symlink file removed: /a/common/docroot/bits/static-1.22wmf10/extensions
Symlink file removed: /a/common/docroot/bits/static-1.22wmf10/resources
Symlink file removed: /a/common/w/static-1.22wmf10/skins
Symlink file removed: /a/common/w/static-1.22wmf10/extensions
Symlink file removed: /a/common/w/static-1.22wmf10/resources
Directory removed: /a/common/docroot/bits/static-1.22wmf10
Directory removed: /a/common/w/static-1.22wmf10

References to MediaWiki 1.22wmf10 deleted.
PHP Warning:  Missing argument 1 for updateBitsBranchPointers(), called in /a/common/multiversion/deleteMediaWiki on line 95 and defined in /a/common/multiversion/updateBitsBranchPointers on line 22
Updating current branch pointer...
PHP Notice:  Undefined variable: dryRun in /a/common/multiversion/updateBitsBranchPointers on line 40
PHP Notice:  Undefined variable: dryRun in /a/common/multiversion/updateBitsBranchPointers on line 71
/a/common/docroot/bits/static-current/skins => /usr/local/apache/common-local/php-1.22wmf21/skins
PHP Notice:  Undefined variable: dryRun in /a/common/multiversion/updateBitsBranchPointers on line 71
/a/common/docroot/bits/static-current/extensions => /usr/local/apache/common-local/php-1.22wmf21/extensions
PHP Notice:  Undefined variable: dryRun in /a/common/multiversion/updateBitsBranchPointers on line 71
/a/common/docroot/bits/static-current/resources => /usr/local/apache/common-local/php-1.22wmf21/resources

Updating stable branch pointer...
PHP Notice:  Undefined variable: dryRun in /a/common/multiversion/updateBitsBranchPointers on line 40
PHP Notice:  Undefined variable: dryRun in /a/common/multiversion/updateBitsBranchPointers on line 71
/a/common/docroot/bits/static-stable/skins => /usr/local/apache/common-local/php-1.22wmf20/skins
PHP Notice:  Undefined variable: dryRun in /a/common/multiversion/updateBitsBranchPointers on line 71
/a/common/docroot/bits/static-stable/extensions => /usr/local/apache/common-local/php-1.22wmf20/extensions
PHP Notice:  Undefined variable: dryRun in /a/common/multiversion/updateBitsBranchPointers on line 71
/a/common/docroot/bits/static-stable/resources => /usr/local/apache/common-local/php-1.22wmf20/resources

reedy@tin:/a/common$

Change-Id: Id30b59abe37705cf3931066f5ee43a3159ff73e7