[clang-format][NFC] Remove superfluous code in UnwrappedLineParser

clang/lib/Format/UnwrappedLineParser.cpp

 }
 
 // Here we exclude certain tokens that are not usually the first token in an
 // unwrapped line. This is used in attempt to distinguish macro calls without
 // trailing semicolons from other constructs split to several lines.
 static bool tokenCanStartNewLine(const FormatToken &Tok) {
   // Semicolon can be a null-statement, l_square can be a start of a macro or
   // a C++11 attribute, but this doesn't seem to be common.
+  assert(Tok.isNot(TT_AttributeSquare));
   return Tok.isNot(tok::semi) && Tok.isNot(tok::l_brace) &&
-         Tok.isNot(TT_AttributeSquare) &&
          // Tokens that can only be used as binary operators and a part of
          // overloaded operator names.
          Tok.isNot(tok::period) && Tok.isNot(tok::periodstar) &&
          Tok.isNot(tok::arrow) && Tok.isNot(tok::arrowstar) &&
          Tok.isNot(tok::less) && Tok.isNot(tok::greater) &&
          Tok.isNot(tok::slash) && Tok.isNot(tok::percent) &&
          Tok.isNot(tok::lessless) && Tok.isNot(tok::greatergreater) &&
          Tok.isNot(tok::equal) && Tok.isNot(tok::plusequal) &&
if (Style.isVerilog()) {
       while (FormatTok->is(tok::l_square))
         parseSquare();
     } else {
       nextToken();
     }
     // We can have macros or attributes in between 'enum' and the enum name.
     if (FormatTok->is(tok::l_paren))
       parseParens();
-    if (FormatTok->is(TT_AttributeSquare)) {
-      parseSquare();
-      // Consume the closing TT_AttributeSquare.
-      if (FormatTok->Next && FormatTok->is(TT_AttributeSquare))
-        nextToken();
-    }
+    assert(FormatTok->isNot(TT_AttributeSquare));
     if (FormatTok->is(tok::identifier)) {
       nextToken();
       // If there are two identifiers in a row, this is likely an elaborate
       // return type. In Java, this can be "implements", etc.
       if (Style.isCpp() && FormatTok->is(tok::identifier))
         return false;
     }
   }