C++: Remove workaround for crashing if parsing invalid code

This reverts the changes

    commit beac7b9539
    C++: Fix highlighting after "invalid code"

    commit 78ab287fc6
    C++: Stop parsing a declaration after two tries

which were a work around for QTCREATORBUG-12890.

A follow-up patch provides a proper fix.

Task-number: QTCREATORBUG-12890
Change-Id: I2650a8e41c8ff1180cad9f069e463fc51bd2f1b1
Reviewed-by: Erik Verbruggen <erik.verbruggen@theqtcompany.com>

src/libs/3rdparty/cplusplus/TranslationUnit.cpp

@@ -49,8 +49,7 @@ TranslationUnit::TranslationUnit(Control *control, const StringLiteral *fileId)
       _lastSourceChar(0),
       _pool(0),
       _ast(0),
-      _flags(0),
-      _retryParseDeclarationLimit(defaultRetryParseDeclarationLimit())
+      _flags(0)
 {
     _tokens = new std::vector<Token>();
     _comments = new std::vector<Token>();
@@ -300,7 +299,7 @@ bool TranslationUnit::parse(ParseMode mode)
 
     f._parsed = true;
 
-    Parser parser(this, _retryParseDeclarationLimit);
+    Parser parser(this);
     bool parsed = false;
 
     switch (mode) {