Meshes missing after teleport

[akleshchev]

Test plan

We don't have a solid recipe for this bug.

• Teleport between areas that you are familiar with and verify the meshes are visible as expected.

Environment

Second Life Release 7.1.14.14742193597 (64bit)

Description

Sometimes meshes do not load after teleport. Reported by firestorm, with a contribution: #4078

But it was decided that we should just remove meshRezEnabled.

[Dan-Linden]

Passed QA.
Verified on Second Life Release 7.1.14.15168982799 on Win11/OSX in the scope of https://github.com/secondlife/iqa/issues/497