Revert "Feature add pgcrypto ext (#795)"

This reverts commit ba2b3e9.

crates/arroyo/src/main.rs

@@ -372,19 +372,6 @@ async fn migrate(wait: Option<u32>) -> anyhow::Result<()> {
         config().database.postgres
     );
 
-    // make compatible with lower version PG (i.g. 12.16) which not support function
-    // gen_random_uuid by default.
-    client
-        .batch_execute("CREATE EXTENSION IF NOT EXISTS pgcrypto;")
-        .await
-        .map_err(|e| {
-            anyhow!(
-                "Failed to create extension pgcrypto on {:?}: {:?}",
-                config().database.postgres,
-                e
-            )
-        })?;
-
     let report = migrations::migrations::runner()
         .run_async(&mut client)
         .await