Forced import does not fully clean up removed production items.

Over time, we have cleaned up/removed a number of obsolete production items. However, these items are still tracked in `^SYS("SourceControl", "Git", "TSH")` and `^SYS("SourceControl", "Git", "items")`

As far as I can tell, this is not causing any functional problems. However it does add noise to the Forced import log.

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- Embedded Git v2.17.0
- Pull Handler: IncrementalLoad
- Decompose Productions: On/True
- $zv: Iris for Windows 2025.1.2 (Build 374U)

Start by examining the Forced import process and how it reads ^SYS("SourceControl", "Git", "TSH") and ^SYS("SourceControl", "Git", "items"). Reproduce or inspect the Forced import log with the listed production items, then trace where removed items should be discarded. Done means obsolete production entries no longer add noise to the log without changing functional behavior.

Written by the indexing model from the issue text.