Remove mention of bug in SQLite3

Since the refactoring towards PSR-16 it is very unlikely that the bug
still exists.

README.md

@@ -38,10 +38,6 @@ PhpSpreadsheet is a library written in pure PHP and providing a set of classes t
  * PHP extension php_xml enabled
  * PHP extension php_gd2 enabled (optional, but required for exact column width autocalculation)
 
-*Note:* PHP 5.6.29 has [a bug](https://bugs.php.net/bug.php?id=73530) that
-prevents SQLite3 caching to work correctly. Use a newer (or older) versions of
-PHP if you need SQLite3 caching.
-
 ## PHP version support
 
 Support for PHP versions will only be maintained for a period of six months beyond the end-of-life of that PHP version

docs/index.md

@@ -17,10 +17,6 @@ The following software is required to develop using PhpSpreadsheet:
 -   PHP extension php\_xml enabled
 -   PHP extension php\_gd2 enabled (if not compiled in)
 
-**Note:** PHP 5.6.29 has [a bug](https://bugs.php.net/bug.php?id=73530) that
-prevents SQLite3 caching to work correctly. Use a newer (or older) versions of
-PHP if you need SQLite3 caching.
-
 ## Installation
 
 Use [composer](https://getcomposer.org/) to install PhpSpreadsheet into your project:

tests/PhpSpreadsheetTests/SampleTest.php

@@ -30,8 +30,6 @@ class SampleTest extends \PHPUnit_Framework_TestCase
         if (in_array('--coverage-clover', $argv)) {
             $tooLongToBeCovered = [
                 '06 Largescale',
-                '06 Largescale with cellcaching',
-                '06 Largescale with cellcaching sqlite3',
                 '13 CalculationCyclicFormulae',
             ];
             $skipped = array_merge($skipped, $tooLongToBeCovered);