Clean up a few stray files that ended up in the wrong place

I also deleted some of upb's dotfiles that are either obsolete (like
`.bazelci/presubmit.yml`) or seem to be superseded by protobuf's dotfiles.

PiperOrigin-RevId: 568873088

google3/third_party/upb/github/.bazelci/presubmit.yml

@@ -1,16 +0,0 @@
----
-tasks:
-  ubuntu:
-    platform: ubuntu2004
-    shell_commands:
-    - "sudo apt -y update && sudo apt -y install libreadline-dev cmake rsync"
-    build_flags:
-    - "--incompatible_disallow_empty_glob"
-    test_targets:
-    - //...
-  macos:
-    platform: macos
-    build_flags:
-    - "--incompatible_disallow_empty_glob"
-    test_targets:
-    - //...

google3/third_party/upb/github/.bazelignore

@@ -1 +0,0 @@
-_build

google3/third_party/upb/github/.bazelrc

@@ -1,63 +0,0 @@
-# temporary fix for https://github.com/bazelbuild/bazel/issues/12905 on macOS
-build --features=-debug_prefix_map_pwd_is_dot
-
-# Pin to C++17
-build --cxxopt=-std=c++17 --host_cxxopt=-std=c++17
-build:cpp17_msvc --cxxopt=/std:c++17 --host_cxxopt=/std:c++17
-
-# Disallow empty globs
-build: --incompatible_disallow_empty_glob
-
-# Use our custom-configured c++ toolchain.
-
-build:m32 --copt=-m32 --linkopt=-m32
-build:asan --copt=-fsanitize=address --linkopt=-fsanitize=address
-build:msan --copt=-fsanitize=memory --linkopt=-fsanitize=memory
-
-# For Valgrind, we have to disable checks of "possible" leaks because the Python
-# interpreter does the sorts of things that flag Valgrind "possible" leak checks.
-# Ideally we could enforce a stricter check for the non-Python tests, but I don't
-# know of an easy way to do that.
-#
-# We also have to disable pymalloc to avoid triggering Valgrind.
-build:valgrind --run_under='valgrind --leak-check=full --track-origins=yes --trace-children=yes --show-leak-kinds=all --error-exitcode=1 --num-callers=500 ' --action_env=PYTHONMALLOC=malloc
-
-build:ubsan --copt=-fsanitize=undefined --linkopt=-fsanitize=undefined --action_env=UBSAN_OPTIONS=halt_on_error=1:print_stacktrace=1
-# Workaround for the fact that Bazel links with $CC, not $CXX
-# https://github.com/bazelbuild/bazel/issues/11122#issuecomment-613746748
-build:ubsan --copt=-fno-sanitize=function --copt=-fno-sanitize=vptr
-# Workaround for https://bugs.llvm.org/show_bug.cgi?id=16404
-build:ubsan --linkopt=--rtlib=compiler-rt --linkopt=-lunwind
-
-build:Werror --copt=-Werror
-build:Werror --per_file_copt=json/parser@-Wno-error
-build:Werror --per_file_copt=com_google_protobuf@-Wno-error
-
-# GCC's -fanalyzer, a deeper static analysis than normal warnings.
-build:analyzer --copt=-fanalyzer --copt=-Werror
-build:analyzer --per_file_copt=json/parser@-fno-analyzer
-build:analyzer --per_file_copt=com_google_protobuf@-fno-analyzer
-build:analyzer --per_file_copt=com_github_google_benchmark@-fno-analyzer
-
-# --config=asan-libfuzzer
-build:asan-libfuzzer --action_env=CC=clang
-build:asan-libfuzzer --action_env=CXX=clang++
-build:asan-libfuzzer --@rules_fuzzing//fuzzing:cc_engine=@rules_fuzzing//fuzzing/engines:libfuzzer
-build:asan-libfuzzer --@rules_fuzzing//fuzzing:cc_engine_instrumentation=libfuzzer
-build:asan-libfuzzer --@rules_fuzzing//fuzzing:cc_engine_sanitizer=asan
-
-# --config=msan-libfuzzer
-build:msan-libfuzzer --action_env=CC=clang
-build:msan-libfuzzer --action_env=CXX=clang++
-build:msan-libfuzzer --@rules_fuzzing//fuzzing:cc_engine=@rules_fuzzing//fuzzing/engines:libfuzzer
-build:msan-libfuzzer --@rules_fuzzing//fuzzing:cc_engine_instrumentation=libfuzzer
-build:msan-libfuzzer --@rules_fuzzing//fuzzing:cc_engine_sanitizer=msan
-
-# --config=ubsan-libfuzzer
-build:ubsan-libfuzzer --action_env=CC=clang
-build:ubsan-libfuzzer --action_env=CXX=clang++
-build:ubsan-libfuzzer --@rules_fuzzing//fuzzing:cc_engine=@rules_fuzzing//fuzzing/engines:libfuzzer
-build:ubsan-libfuzzer --@rules_fuzzing//fuzzing:cc_engine_instrumentation=libfuzzer
-build:ubsan-libfuzzer --copt=-fsanitize=undefined
-build:ubsan-libfuzzer --linkopt=-fsanitize=undefined
-build:ubsan-libfuzzer --linkopt=-fsanitize-link-c++-runtime

google3/third_party/upb/github/.gitignore

@@ -1,6 +0,0 @@
-*.sw?
-obj/
-lib/
-bazel-*
-_build
-.vscode