Fix "Deprecated: Use of "self" in callables is deprecated"

alhimik1986 / php-excel-templator

PHP Spreadsheet extension to the export excel file from excel template

MIT License

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Open ma4nn opened 2 months ago

ma4nn commented 2 months ago

This small PR fixes

the PHP 8.3 deprecation warning about "Deprecated: Use of "self" in callables is deprecated"
invalid Exceptions
removed unused function updateNamedFormulas()