Remove old way of account hashing

Account data hashing used to use different ways of hashing on different
clusters.  That is no longer the case, but the old code still existed.
This commit removes that old, now used code.

**NOTE** The golden hash values within the tests have been updated, but
they **have not been validated**!  The new values came from the "actual"
values as reported by `cargo test` when the tests failed.

Validated by running `cargo test` from within `runtime`.

runtime/src/accounts_cache.rs

@@ -2,7 +2,6 @@ use dashmap::DashMap;
 use solana_sdk::{
     account::{AccountSharedData, ReadableAccount},
     clock::Slot,
-    genesis_config::ClusterType,
     hash::Hash,
     pubkey::Pubkey,
 };
@@ -114,7 +113,7 @@ pub struct CachedAccountInner {
 }
 
 impl CachedAccountInner {
-    pub fn hash(&self, cluster_type: ClusterType) -> Hash {
+    pub fn hash(&self) -> Hash {
         let hash = self.hash.read().unwrap();
         match *hash {
             Some(hash) => hash,
@@ -124,7 +123,6 @@ impl CachedAccountInner {
                     self.slot,
                     &self.account,
                     &self.pubkey,
-                    &cluster_type,
                 );
                 *self.hash.write().unwrap() = Some(hash);
                 hash