[clangd] Get rid of AST matchers in CodeComplete, NFC
[clangd] Get rid of AST matchers in CodeComplete, NFC

Summary:
The isIndexedForCodeCompletion is called in the code patch of
SymbolCollector.

Reviewers: kadircet

Subscribers: ilya-biryukov, ioeric, MaskRay, jkorous, arphaman, cfe-commits

Differential Revision: https://reviews.llvm.org/D55206

git-svn-id: a34e9779ed74578ad5922b3306b3d80a0c825546@348130 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra