Generic/OpeningFunctionBraceKernighanRichie: remove repeated call to findPrevious()

This commit removes a repeated call to findPrevious() to get the pointer
to the end of the function declaration. The same `$prev` variable that
was defined a few lines above can be reused and there is no need to
define it again calling `findPrevious()` with exactly the same
parameters.

Author: rodrigoprimo

src/Standards/Generic/Sniffs/Functions/OpeningFunctionBraceKernighanRitchieSniff.php

@@ -99,7 +99,6 @@ public function process(File $phpcsFile, $stackPtr)
             $error = 'Opening brace should be on the same line as the declaration';
             $fix   = $phpcsFile->addFixableError($error, $openingBrace, 'BraceOnNewLine');
             if ($fix === true) {
-                $prev = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($openingBrace - 1), $closeBracket, true);
                 $phpcsFile->fixer->beginChangeset();
                 $phpcsFile->fixer->addContent($prev, ' {');
                 $phpcsFile->fixer->replaceToken($openingBrace, '');