[SchedModel] Remove std::vectors that were created with 1 element and then passed to an ArrayRef parameter.

ArrayRef can capture a single element. We don't need a vector for that.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328438 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed