Remove greater.invalid baseline and fix its issue

[dpanta94]

Removes in total 1 errors.

Removes errors from the below phpstan baselines and fixes the issues that they were covering:

• greater.invalid

How ?

Removes dead else if statement.

Trac ticket: https://core.trac.wordpress.org/ticket/65817

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code
Model(s): Opus 5
Used for: Help with suggesting how to fix the phpstan output for the specific errors we are removing the baselines for. The actual result has been reviewed and are owned by me.

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[dmsnell]

it seems like this function was written when get_col_length() could return a string, and then was moved in 1cccb02 and stuck around even though get_col_length() was changed in 2ce97b2 to never return a string. this dangled on unused.

to that end it seems like this should be safe to remove.

that being said, if we remove it we make the code fragile, because we remove a runtime-enforced type constraint with a source-time assumption about it. if get_col_length() changes again as it changed in the past, this could lead to a crash on property access of a non-array.

the original code would have been clearer as if ( is_string() ) than if ( ! is_array() ), but we could potentially remove this and leave the safety.

} elseif ( ! is_array( $content_length ) ) {
	return;
}

PHPStan might still complain, but avoiding crashes is more important than making the linter gods happy