Revert "[Serialization] Fix some Clang-tidy modernize and Include What You Use warnings; other minor fixes (NFC)."

This reverts commit r330068. It breaks the lldb bots due to assertion
failures (more details on cfe-commits).

http://lab.llvm.org:8080/green/view/LLDB/job/lldb-cmake/
http://lab.llvm.org:8080/green/view/LLDB/job/lldb-cmake/6341/

stderr: Assertion failed: (M && "imported decl from no module file"), function loadPendingDeclChain, file /Users/vsk/src/llvm.org-lldbsan/llvm/tools/clang/lib/Serialization/ASTReaderDecl.cpp, line 3861.
llvm-svn: 330080
1 file changed
tree: 1a78b0d876005084cb4934a053e83599fbc2dd57
  1. clang/
  2. clang-tools-extra/
  3. compiler-rt/
  4. debuginfo-tests/
  5. libclc/
  6. libcxx/
  7. libcxxabi/
  8. libunwind/
  9. lld/
  10. lldb/
  11. llgo/
  12. llvm/
  13. openmp/
  14. parallel-libs/
  15. polly/
  16. README.md
README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.