Remove ParseSimpleParenExpression.
Embed its functionality into it's only user, ParseCXXCasts.
CXXCasts now get the "actual" expression directly, they no longer always receive a ParenExpr. This is better since the
parentheses are always part of the C++ casts syntax.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72257 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed