Merge pull request #497 from jbj/disable-no-virtual-destructor

C++: Remove @precision from AV Rule 78

Author: geoffw0

cpp/ql/src/jsf/4.10 Classes/AV Rule 78.ql

@@ -3,7 +3,6 @@
  * @description All base classes with a virtual function should define a virtual destructor. If an application attempts to delete a derived class object through a base class pointer, the result is undefined if the base class destructor is non-virtual.
  * @kind problem
  * @problem.severity warning
- * @precision high
  * @id cpp/jsf/av-rule-78
  * @tags reliability
  *       readability