cl-ast: Remove tail from let (it caused more problems that it could've solved)

compiler/cl-ast/src/ast_impl.rs

@@ -443,7 +443,7 @@ mod display {
 
     impl Display for Let {
         fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-            let Self { mutable, name, ty, init, tail } = self;
+            let Self { mutable, name, ty, init } = self;
             write!(f, "let {mutable}{name}")?;
             if let Some(value) = ty {
                 write!(f, ": {value}")?;
@@ -451,9 +451,6 @@ mod display {
             if let Some(value) = init {
                 write!(f, " = {value}")?;
             }
-            if let Some(value) = tail {
-                write!(f, ";\n{value}")?;
-            }
             Ok(())
         }
     }