[php-src] Issue #7966: Private method warning emitted when running `install-pear-nozlib.phar`

Issue: https://github.com/php/php-src/issues/7966 Author: ramsey ### Description Grab one of the 8.1.2 tarballs from [php/web-php-distributions](https://github.com/php/web-php-distributions) and unpack it. cd into its directory. Then, run (I ran it with PHP 8.1.1, using the Phar included in the 8.1.2 tarball): ```shell php pear/install-pear-nozlib.phar ``` This results in this output: ``` PHP Warning: Private methods cannot be final as they are never overridden by other classes in /path/to/php-8.1.2/pear/install-pear-nozlib.phar on line 339 Warning: Private methods cannot be final as they are never overridden by other classes in /path/to/php-8.1.2/pear/install-pear-nozlib.phar on line 339 [PEAR] Archive_Tar - already installed: 1.4.14 [PEAR] Console_Getopt - already installed: 1.4.3 [PEAR] Structures_Graph- already installed: 1.1.1 [PEAR] XML_Util - already installed: 1.4.5 [PEAR] PEAR - already installed: 1.10.13 Warning! a PEAR user config file already exists from a previous PEAR installation at '/home/user/.pearrc'. You may probably want to remove it. Wrote PEAR system config file at: /usr/local/etc/php/8.1/pear.conf You may want to add: /usr/local/Cellar/php/8.1.1/share/php/pear to your php.ini include_path ``` But I expected this output instead: ``` [PEAR] Archive_Tar - already installed: 1.4.14 [PEAR] Console_Getopt - already installed: 1.4.3 [PEAR] Structures_Graph- already installed: 1.1.1 [PEAR] XML_Util - already installed: 1.4.5 [PEAR] PEAR - already installed: 1.10.13 Warning! a PEAR user config file already exists from a previous PEAR installation at '/home/user/.pearrc'. You may probably want to remove it. Wrote PEAR system config file at: /usr/local/etc/php/8.1/pear.conf You may want to add: /usr/local/Cellar/php/8.1.1/share/php/pear to your php.ini include_path ``` ### PHP Version PHP 8.1.1 ### Operating System macOS 12.1