[assembler] fix some Clippy warnings.

Author: youngman-g

assembler/src/asmlib/eval.rs

@@ -33,16 +33,6 @@ impl From<(MemoryReference, Span)> for LookupTarget {
     }
 }
 
-impl LookupTarget {
-    fn span(&self) -> &Span {
-        match self {
-            LookupTarget::Hash(span)
-            | LookupTarget::Symbol(_, span)
-            | LookupTarget::MemRef(_, span) => span,
-        }
-    }
-}
-
 impl Display for LookupTarget {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), fmt::Error> {
         match self {

assembler/src/asmlib/parser.rs

@@ -185,7 +185,7 @@ where
 {
     choice((
         here(script_required),
-        named_symbol(script_required).map(|name| SymbolOrHere::Named(name)),
+        named_symbol(script_required).map(SymbolOrHere::Named),
     ))
     .labelled("symex (symbol)")
 }
@@ -274,7 +274,7 @@ where
         superscript_literal_config_value,
         superscript_symbolic_config_value,
     ))
-    .map(|config| InstructionFragment::Config(config))
+    .map(InstructionFragment::Config)
 }
 
 fn program_instruction_fragments<'srcbody, I>(