SwCrsrShell: remove pointless resetting of Mark positions...
SwCrsrShell: remove pointless resetting of Mark positions...

... before calling DeleteMark(), which actually resets the Mark
position to something guaranteed not to be an SwIndexReg since CWS
odfmetadata2; checking HasMark() before DeleteMark() is pointless too.

Change-Id: I145c3800a4a7e5d20de9567d8f3163431577e918

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core