'd' can't appear in the 'added by older versions' compatibility code

I added the code that I remove here in commit
22d7827c66 (tdf#168569: support date
values in string pool, 2025-09-26), but this is section to handle
old images, after commit 3bcfb1aac1
(tdf#143707 - Change strategy to support suffix type characters,
2021-08-10) the suffixes are written in a way that is handled in
SbiImage::GetString.

Change-Id: Ia2ad05f1e146dc40686f2baf07f178331f1ff4a7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/191561
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
Tested-by: Jenkins

basic/source/classes/image.cxx

@@ -618,7 +618,6 @@ void SbiImage::AddEnum(SbxObject* pObject) // Register enum type
     rEnums->Insert(pObject, rEnums->Count());
 }
 
-// See also: SbiRuntime::StepLOADNC
 // Note: IDs start with 1
 OUString SbiImage::GetString( sal_uInt32 nId, SbxDataType *eType ) const
 {

basic/source/runtime/runtime.cxx

@@ -2810,7 +2810,7 @@ void SbiRuntime::StepERROR()
 }
 
 // loading a numeric constant (+ID)
-// See also: SbiImage::GetString
+
 void SbiRuntime::StepLOADNC( sal_uInt32 nOp1 )
 {
     // tdf#143707 - check if the data type character was added after the string termination symbol
@@ -2842,8 +2842,6 @@ void SbiRuntime::StepLOADNC( sal_uInt32 nOp1 )
             case '@': eType = SbxCURRENCY; break;
             // tdf#142460 - properly handle boolean values in string pool
             case 'b': eType = SbxBOOL; break;
-            // tdf#168569 - support date values in string pool
-            case 'd': eType = SbxDATE; break; // Not in GetSuffixType
         }
     }
     // tdf#143707 - if the data type character is different from the default value, it was added