Revert "[lineeditor] Add `setHistorySize()` method for adjusting history size (#110092)"
This reverts commit ec05b883653ba1bb9e92399f78b99a9d9342efc0.
Reason: buildbot breakage (https://lab.llvm.org/buildbot/#/builders/66/builds/5904)
/home/b/sanitizer-x86_64-linux/build/llvm-project/llvm/lib/LineEditor/LineEditor.cpp:23:15: error: unused variable 'DefaultHistorySize' [-Werror,-Wunused-const-variable]
23 | constexpr int DefaultHistorySize = 800;
| ^~~~~~~~~~~~~~~~~~
1 error generated.
llvm-project
9501af5f - Revert "[lineeditor] Add `setHistorySize()` method for adjusting history size (#110092)"
