Remove unused variable in reload.pp

[ekohl]

When service_reload was introduced, it made service_name redundant.

Fixes: ef1681f

[puppet-community-rangefinder]

postgresql::server::reload is a class

that may have no external impact to Forge modules.

This module is declared in 70 of 578 indexed public Puppetfiles.

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Exact matches are those that we can positively identify via namespace and the declaring modules' metadata. Non-namespaced items, such as Puppet 3.x functions, will always be reported as near matches only.

[smortex]

LGTM