Revert r299672: Add a virtual destructor to a class with virtual methods.
Revert r299672: Add a virtual destructor to a class with virtual methods.

Reason: breaks sanitizers builds.

Original Differential Revision: https://reviews.llvm.org/D317



git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@299679 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt