Delete unused file gen_compilation_database.sh (#792)
Delete unused file gen_compilation_database.sh (#792)

Signed-off-by: Nathan Perry <4c691bf31de3e4decbcd3b0822613b3ac19c4a1f@google.com>
envoyproxy/nighthawk,envoyproxy/nighthawk,envoyproxy/nighthawk,envoyproxy/nighthawk