Tokenizer::simplifyEmptyNamespaces: remove useless condition.

Token::deleteThis handles the !tok->next situation well.

lib/tokenize.cpp

@@ -3629,16 +3629,14 @@ void Tokenizer::simplifyEmptyNamespaces()
             continue;
         if (tok->strAt(3) == "}") {
             tok->deleteNext(3);             // remove '%var% { }'
-            if (tok->next()) {              // '%empty% namespace %anytoken%'?
             if (!tok->previous()) {
-                    tok->deleteThis();      // remove 'namespace'
+                // remove 'namespace' or replace it with ';' if isolated
+                tok->deleteThis();
                 goback = true;
             } else {                    // '%any% namespace %any%'
                 tok = tok->previous();  // goto previous token
                 tok->deleteNext();      // remove next token: 'namespace'
             }
-            } else                          // '%empty% namespace %empty%'?
-                tok->str(";");              // change 'namespace' to ';'
         } else {
             tok = tok->tokAt(2);
         }