[Subcontracting] Removing dead code from subcontracting.

[6CRIPT]

Fixes AB#638466

[github-actions]

$\textbf{🟠\ High\ Severity\ —\ Upgrade} \quad \color{gray}{\texttt{\small Iteration\ 1}}$

Field removed without obsolete deprecation lifecycle

Field "Source Subtype" (ID 99001535) is directly deleted from three table extensions (SubcTransferHeader, SubcTransRcptHeaderExt, SubcTransShptHeaderExt) without first going through the required Business Central deprecation lifecycle. Any per-tenant or partner extension that references "Source Subtype" on these tables will fail to compile after the upgrade.

Recommendation:

• Follow the BC deprecation path: first mark the field as ObsoleteState = Pending; ObsoleteReason = '...; ObsoleteTag = '...' in one release, then ObsoleteState = Removed in a subsequent release, and only physically delete the field after the removed state has shipped. Also consider adding an upgrade codeunit to null out or migrate any existing values stored in the column.

field(99001535; "Source Subtype"; Option)
{
    Caption = 'Source Subtype';
    DataClassification = CustomerContent;
    OptionCaption = '0,1,2,3,4,5,6,7,8,9,10';
    OptionMembers = "0","1","2","3","4","5","6","7","8","9","10";
    ObsoleteState = Pending;
    ObsoleteReason = 'Use "Subc. Source Type" instead.';
    ObsoleteTag = '<NextVersion>';
}

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_{👍 useful · ❤️ especially valuable · 👎 wrong - reply with why}