fpspreadsheet: Remove built-in number formats nfSci (not suppored by ods and fpc) and nfAccounting/nfAccountingRed (too much display-oriented, too cumbersome to implement for reading and displaying in the grid). If needed in Excel they can still be written using nfCustom. Update all files and tests for these now no longer existing formats.

git-svn-id: http://svn.code.sf.net/p/lazarus-ccr/svn@3222 8e941d3f-bd1b-0410-a28a-d453659cc2b4