travis: suppressions: remove some suppressions of false positives that are no longer necessary.
#5782 Endless recursion in CheckClass::checkReturnPtrThis(). Break endless recursion by remembering the callstack
#5782 Endless recursion in CheckClass::checkReturnPtrThis(). Break endless recursion by remembering the callstack (missing header file)
Some cleanup for CppcheckSignalHandler, also some cosmetics for the output
Merge pull request #304 from matthiaskrgr/travis

travis: suppressions: remove some suppressions of false positives that are no longer necessary.
Simplified some Token::Match patterns
AST: Parse ternary and assignment operators as right-to-left and on the same precedence level
#5793 - False positive: Deallocation of an auto-variable (at reference notation)