Merge commit '95639b754878' from llvm.org/main into next

Author: git apple-llvm automerger

.ci/monolithic-linux.sh

@@ -23,11 +23,6 @@ rm -rf "${BUILD_DIR}"
 
 ccache --zero-stats
 
-if [[ -n "${CLEAR_CACHE:-}" ]]; then
-  echo "clearing cache"
-  ccache --clear
-fi
-
 mkdir -p artifacts/reproducers
 
 # Make sure any clang reproducers will end up as artifacts.

.ci/monolithic-windows.sh

@@ -21,11 +21,6 @@ BUILD_DIR="${BUILD_DIR:=${MONOREPO_ROOT}/build}"
 
 rm -rf "${BUILD_DIR}"
 
-if [[ -n "${CLEAR_CACHE:-}" ]]; then
-  echo "clearing sccache"
-  rm -rf "$SCCACHE_DIR"
-fi
-
 sccache --zero-stats
 function at-exit {
   retcode=$?