SCC: Remove redundant inline keywords, NFC

Functions declared in line in a class are inlined by default.  There's
no reason for the `inline` keyword.

<rdar://problem/14292693>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207248 91177308-0d34-0410-b5e6-96231b3b80d8