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.h

@@ -149,9 +149,6 @@ public:
     LanguageFeatures languageFeatures() const { return _languageFeatures; }
     void setLanguageFeatures(LanguageFeatures features) { _languageFeatures = features; }
 
-    static int defaultRetryParseDeclarationLimit() { return 2; }
-    void setRetryParseDeclarationLimit(int limit) { _retryParseDeclarationLimit = limit; }
-
 private:
     struct PPLine {
         unsigned utf16charOffset;
@@ -213,8 +210,6 @@ private:
         Flags f;
     };
     LanguageFeatures _languageFeatures;
-
-    int _retryParseDeclarationLimit;
 };
 
 } // namespace CPlusPlus