[clang-tools-extra] Revert "[clang-doc] add ftime profiling" (PR #100251)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-sie-win` running on `sie-win-worker` while building `clang-tools-extra` at step 7 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/46/builds/2175

Here is the relevant piece of the build log for the reference:
```
Step 7 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'Clang Tools :: clang-doc/namespace.cpp' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
rm -rf Z:\b\llvm-clang-x86_64-sie-win\build\tools\clang\tools\extra\test\clang-doc\Output\namespace.cpp.tmp && mkdir -p Z:\b\llvm-clang-x86_64-sie-win\build\tools\clang\tools\extra\test\clang-doc\Output\namespace.cpp.tmp
# executed command: rm -rf 'Z:\b\llvm-clang-x86_64-sie-win\build\tools\clang\tools\extra\test\clang-doc\Output\namespace.cpp.tmp'
# executed command: mkdir -p 'Z:\b\llvm-clang-x86_64-sie-win\build\tools\clang\tools\extra\test\clang-doc\Output\namespace.cpp.tmp'
# RUN: at line 2
clang-doc --format=html --output=Z:\b\llvm-clang-x86_64-sie-win\build\tools\clang\tools\extra\test\clang-doc\Output\namespace.cpp.tmp --executor=standalone Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang-tools-extra\test\clang-doc\namespace.cpp
# executed command: clang-doc --format=html '--output=Z:\b\llvm-clang-x86_64-sie-win\build\tools\clang\tools\extra\test\clang-doc\Output\namespace.cpp.tmp' --executor=standalone 'Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang-tools-extra\test\clang-doc\namespace.cpp'
# .---command stdout------------
# | Emiting docs in html format.
# | Mapping decls...
# | Collecting infos...
# | Reducing 9 infos...
# | Generating docs...
# | Generating assets for docs...
# `-----------------------------
# .---command stderr------------
# | Error while trying to load a compilation database:
# | Could not auto-detect compilation database for file "Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang-tools-extra\test\clang-doc\namespace.cpp"
# | No compilation database found in Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang-tools-extra\test\clang-doc or any parent directory
# | fixed-compilation-database: Error while opening fixed database: no such file or directory
# | json-compilation-database: Error while opening JSON database: no such file or directory
# | Running without flags.
# `-----------------------------
# RUN: at line 3
clang-doc --format=md --output=Z:\b\llvm-clang-x86_64-sie-win\build\tools\clang\tools\extra\test\clang-doc\Output\namespace.cpp.tmp --executor=standalone Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang-tools-extra\test\clang-doc\namespace.cpp
# executed command: clang-doc --format=md '--output=Z:\b\llvm-clang-x86_64-sie-win\build\tools\clang\tools\extra\test\clang-doc\Output\namespace.cpp.tmp' --executor=standalone 'Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang-tools-extra\test\clang-doc\namespace.cpp'
# .---command stdout------------
# | Emiting docs in md format.
# | Mapping decls...
# | Collecting infos...
# | Reducing 9 infos...
# | Generating docs...
# | Generating assets for docs...
# `-----------------------------
# .---command stderr------------
# | Error while trying to load a compilation database:
# | Could not auto-detect compilation database for file "Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang-tools-extra\test\clang-doc\namespace.cpp"
# | No compilation database found in Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang-tools-extra\test\clang-doc or any parent directory
# | fixed-compilation-database: Error while opening fixed database: no such file or directory
# | json-compilation-database: Error while opening JSON database: no such file or directory
# | Running without flags.
# `-----------------------------
# RUN: at line 4
FileCheck Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang-tools-extra\test\clang-doc\namespace.cpp < Z:\b\llvm-clang-x86_64-sie-win\build\tools\clang\tools\extra\test\clang-doc\Output\namespace.cpp.tmp/index_json.js -check-prefix=JSON-INDEX
# executed command: FileCheck 'Z:\b\llvm-clang-x86_64-sie-win\llvm-project\clang-tools-extra\test\clang-doc\namespace.cpp' -check-prefix=JSON-INDEX
...

```

https://github.com/llvm/llvm-project/pull/100251