PSR2/NamespaceDeclaration: remove redundant condition

What with the change in the namespaced names tokenization, a sniff listening for `T_NAMESPACE` will no longer receive tokens for namespace relative names as those no longer use that token.

Keeping the existing tests for this in place as those are still a good safeguard to prevent a regression slipping in.

Author: jrfnl

src/Standards/PSR2/Sniffs/Namespaces/NamespaceDeclarationSniff.php

@@ -11,7 +11,6 @@
 
 use PHP_CodeSniffer\Files\File;
 use PHP_CodeSniffer\Sniffs\Sniff;
-use PHP_CodeSniffer\Util\Tokens;
 
 class NamespaceDeclarationSniff implements Sniff
 {
@@ -42,12 +41,6 @@ public function process(File $phpcsFile, $stackPtr)
     {
         $tokens = $phpcsFile->getTokens();
 
-        $nextNonEmpty = $phpcsFile->findNext(Tokens::$emptyTokens, ($stackPtr + 1), null, true);
-        if ($tokens[$nextNonEmpty]['code'] === T_NS_SEPARATOR) {
-            // Namespace keyword as operator. Not a declaration.
-            return;
-        }
-
         $end = $phpcsFile->findEndOfStatement($stackPtr);
         for ($i = ($end + 1); $i < ($phpcsFile->numTokens - 1); $i++) {
             if ($tokens[$i]['line'] === $tokens[$end]['line']) {