refactor!(static memory allocation): Remove option to share allocs

Remove unused the option to share static memory allocated values.

This option (read: abomination) was used neither in this repo, nor in
the downstreams `tasm-lang` or `neptune-core`. So I think it's fine just
to delete it.

tasm-lib/src/library.rs

@@ -29,10 +29,6 @@ pub struct Library {
     /// Imported dependencies.
     seen_snippets: HashMap<String, Vec<LabelledInstruction>>,
 
-    /// Known, and thus shareable, (static) memory allocations. Includes both their address and
-    /// their size.
-    pub_allocations: HashMap<String, (BFieldElement, u32)>,
-
     /// The number of statically allocated words
     num_allocated_words: u32,
 }
@@ -51,7 +47,6 @@ impl Library {
     pub fn new() -> Self {
         Self {
             seen_snippets: HashMap::default(),
-            pub_allocations: HashMap::default(),
             num_allocated_words: 0,
         }
     }
@@ -130,6 +125,7 @@ impl Library {
     /// Statically allocate `num_words` words of memory. Panics if more static
     /// memory is required than what the capacity allows for.
     pub fn kmalloc(&mut self, num_words: u32) -> BFieldElement {
+        assert!(num_words > 0, "must allocate a positive number of words");
         let address = STATIC_MEMORY_FIRST_ADDRESS
             - bfe!(self.num_allocated_words)
             - BFieldElement::new(num_words as u64 - 1);
@@ -140,24 +136,6 @@ impl Library {
 
         address
     }
-
-    /// Statically allocate `num_words` words of memory and give it a name.
-    /// Allows sharing the allocation with other snippets.
-    pub fn pub_kmalloc(&mut self, num_words: u32, name: String) -> BFieldElement {
-        let address = self.kmalloc(num_words);
-        if let Some((addr, size)) = self
-            .pub_allocations
-            .insert(name.clone(), (address, num_words))
-        {
-            panic!("Public kmalloc for \"{name}\" overwrote previous allocation: ({addr}, {size})");
-        };
-        address
-    }
-
-    /// Get the address and size of a public allocation.
-    pub fn get_pub_allocation(&self, name: &str) -> (BFieldElement, u32) {
-        self.pub_allocations[name]
-    }
 }
 
 #[derive(Debug)]
@@ -496,12 +474,5 @@ mod tests {
 
         let third_free_address = lib.kmalloc(1000);
         assert_eq!(-BFieldElement::new(1009), third_free_address);
-
-        let fourth_free_address = lib.pub_kmalloc(10_000, "my_thing".to_string());
-        assert_eq!(-BFieldElement::new(11_009), fourth_free_address);
-
-        let (address, size) = lib.get_pub_allocation("my_thing");
-        assert_eq!(fourth_free_address, address);
-        assert_eq!(10_000, size);
     }
 }