[12.x] Remove redundant string casts from config files #55826
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Description
This PR removes unnecessary string casts from calls to the
env()
helper in Laravel's configuration files.The
env()
function already returns string values by default for the following, so explicit string casting is redundant.These casts may also give the misleading impression that
env()
might return non-string values in cases where it does not, potentially confusing developers about the function's behavior. Removing these casts improves code clarity.Reverts: #55737