[lldb-mi] Remove unnecessary const_cast.
[lldb-mi] Remove unnecessary const_cast.

Summary: Remove unnecessary const_cast.

Reviewers: abidh, ki.stfu

Subscribers: lldb-commits

Differential Revision: http://reviews.llvm.org/D10928

git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@241359 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb