fdo#49571: ODF import: ignore "text:enable-numbering" attribute

It has been imported as an alien attribute since CWS impressodf12
5b364c2e, and could not be written
to a document created from scratch anyway.

Change-Id: I054fcf71d7ddc3ed19735b8aa898d1b1a12db5b9

xmloff/source/text/txtprmap.cxx

@@ -272,7 +272,6 @@ XMLPropertyMapEntry aXMLParaPropMap[] =
     MP_E( "ParaRegisterModeActive", STYLE,  REGISTER_TRUE,  XML_TYPE_BOOL, 0 ),
     // RES_PARATR_NUMRULE
     MP_E( "NumberingStyleName", STYLE,  LIST_STYLE_NAME,    MID_FLAG_SPECIAL_ITEM|XML_TYPE_STYLENAME, CTF_NUMBERINGSTYLENAME ),
-    MP_E( "NumberingRules",     TEXT,   ENABLE_NUMBERING,   MID_FLAG_NO_PROPERTY|XML_TYPE_BOOL, CTF_ALIEN_ATTRIBUTE_IMPORT ),
 
     // RES_FILL_ORDER
     // not required