fix: remove dead SelectLayout and AvailableLayoutsFb serial-142 joins

Both entries were forward-looking stubs: IHasCodecLayouts has no
string-based layout-select method, so neither join was ever wired in
LinkVideoCodecCameraLayoutsToApi. String-based layout selection is
Zoom-specific (eLayoutStyle enum) and lives on serial 215 in the EPI.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/PepperDash.Essentials.Core/Bridges/JoinMaps/VideoCodecControllerJoinMap.cs

@@ -1757,35 +1757,6 @@ namespace PepperDash.Essentials.Core.Bridges.JoinMaps;
 				JoinType = eJoinType.Serial
 			});
 
-    [JoinName("AvailableLayoutsFb")]
-    public JoinDataComplete AvailableLayoutsFb = new JoinDataComplete(
-        new JoinData
-        {
-            JoinNumber = 142,
-            JoinSpan = 1
-        },
-        new JoinMetadata
-        {
-            Description = "xSig of all available layouts",
-            JoinCapabilities = eJoinCapabilities.ToSIMPL,
-            JoinType = eJoinType.Serial
-        });
-
-    [JoinName("SelectLayout")]
-    public JoinDataComplete SelectLayout = new JoinDataComplete(
-        new JoinData
-        {
-            JoinNumber = 142,
-            JoinSpan = 1
-        },
-        new JoinMetadata
-        {
-            Description = "Select Layout by string",
-            JoinCapabilities = eJoinCapabilities.FromSIMPL,
-            JoinType = eJoinType.Serial
-        });
-
-
 		/// <summary>
 		/// Current Participants XSig
 		/// </summary>