[clang-doc] Fix expected output in tests

Removes conversion of html paths in output. These will always be in
posix-style paths.

Differential Revision: https://reviews.llvm.org/D65425

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@367279 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed