Fix duplicate error being thrown / space after cast

[jrfnl]

Given the following test code:

<?php
$a = (bool) $b;
$a = (bool)$b;
$a = (bool)       $b;

The current sniffs/ruleset would result in the following errors related to cast spacing:

 3 | ERROR | [x] No space after closing casting parenthesis is prohibited
   |       |     (WordPress.WhiteSpace.CastStructureSpacing.NoSpaceAfterCloseParenthesis)
 3 | ERROR | [x] A cast statement must be followed by a single space
   |       |     (Generic.Formatting.SpaceAfterCast.NoSpace)
 4 | ERROR | [x] A cast statement must be followed by a single space
   |       |     (Generic.Formatting.SpaceAfterCast.TooMuchSpace)

The errors for line 3 are basically duplicates.
Additionally, as shown by line 4, as the upstream sniff also checks the width of the space after a type cast, that sniff is the better choice.

So in this PR, I'm removing the code which generated the WordPress.WhiteSpace.CastStructureSpacing.NoSpaceAfterCloseParenthesis error.

Includes adjusted unit test fixed file.

[GaryJones]

Noting, that the upstream sniff does include fixers already, though they wouldn't apply when doing the unit tests for WPCS, hence, the .fixed file becomes a little un-fixed, to account for only the bits that WPCS does fix!