Delete all.sh bash script (#9500)

1. OSS-Fuzz has grown to the point that running this script is
impractical.
2. The script is unsafe because it builds every project.
3. I don't know that anyone used this.

projects/all.sh

@@ -1,36 +0,0 @@
-#!/bin/bash -eu
-#
-# Copyright 2016 Google Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-################################################################################
-
-for project in projects/*; do
-  if [[ -f $project ]]; then continue; fi
-  echo "@ Building $project"
-  docker build -t gcr.io/oss-fuzz/$project $project/
-
-  # Execute command ($1) if any
-  case ${1-} in
-    "")
-      ;;
-    compile)
-      docker run --rm -ti gcr.io/oss-fuzz/$project $@
-      ;;
-    *)
-      echo $"Usage: $0 {|compile}"
-      exit 1
-  esac
-
-done