Revert "[NO-MERGE; needs gating logic] Introduce eager rent collection (bp #9527) (#10022)" (#10026)

This reverts commit ff21251416.

sdk/src/clock.rs

@@ -85,12 +85,6 @@ pub type Segment = u64;
 ///  some number of Slots.
 pub type Epoch = u64;
 
-/// SlotIndex is an index to the slots of a epoch
-pub type SlotIndex = u64;
-
-/// SlotCount is the number of slots in a epoch
-pub type SlotCount = u64;
-
 /// UnixTimestamp is an approximate measure of real-world time,
 /// expressed as Unix time (ie. seconds since the Unix epoch)
 pub type UnixTimestamp = i64;

sdk/src/hash.rs

@@ -78,14 +78,6 @@ impl Hash {
     pub fn new(hash_slice: &[u8]) -> Self {
         Hash(<[u8; HASH_BYTES]>::try_from(hash_slice).unwrap())
     }
-
-    pub const fn new_from_array(hash_array: [u8; HASH_BYTES]) -> Self {
-        Self(hash_array)
-    }
-
-    pub fn to_bytes(self) -> [u8; HASH_BYTES] {
-        self.0
-    }
 }
 
 /// Return a Sha256 hash for the given data.