Remove unused CACHE_DIR in init_repo.

This was used long ago in Travis/Appveyor, but is no longer used.

src/ci/init_repo.sh

@@ -8,22 +8,12 @@ ci_dir=$(cd $(dirname $0) && pwd)
 . "$ci_dir/shared.sh"
 
 REPO_DIR="$1"
-CACHE_DIR="$2"
-
-cache_src_dir="$CACHE_DIR/src"
 
 if [ ! -d "$REPO_DIR" -o ! -d "$REPO_DIR/.git" ]; then
     echo "Error: $REPO_DIR does not exist or is not a git repo"
     exit 1
 fi
 cd $REPO_DIR
-if [ ! -d "$CACHE_DIR" ]; then
-    echo "Error: $CACHE_DIR does not exist or is not an absolute path"
-    exit 1
-fi
-
-rm -rf "$CACHE_DIR"
-mkdir "$CACHE_DIR"
 
 # On the beta channel we'll be automatically calculating the prerelease version
 # via the git history, so unshallow our shallow clone from CI.

src/ci/scripts/checkout-submodules.sh

@@ -7,11 +7,4 @@ IFS=$'\n\t'
 
 source "$(cd "$(dirname "$0")" && pwd)/../shared.sh"
 
-if isWindows; then
-    path="/c/cache/rustsrc"
-else
-    path="${HOME}/rustsrc"
-fi
-
-mkdir -p "${path}"
-"$(cd "$(dirname "$0")" && pwd)/../init_repo.sh" . "${path}"
+"$(cd "$(dirname "$0")" && pwd)/../init_repo.sh" .