remove searchParameter() from lookups

it shouldn't be needed to look up subroutine parameters by scoped name

compilerAst/src/prog8/ast/AstToplevel.kt

@@ -76,9 +76,6 @@ interface IStatementContainer {
     fun isNotEmpty(): Boolean = statements.isNotEmpty()
 
     fun searchSymbol(name: String): Statement? {
-        if(this is Subroutine && isAsmSubroutine)
-            return searchParameter(name)
-
         // this is called quite a lot and could perhaps be optimized a bit more,
         // but adding a memoization cache didn't make much of a practical runtime difference...
         for (stmt in statements) {
@@ -139,9 +136,6 @@ interface IStatementContainer {
             }
         }
 
-        if(this is Subroutine && !isAsmSubroutine)
-            return searchParameter(name)
-
         return null
     }
 

compilerAst/src/prog8/ast/statements/AstStatements.kt

@@ -720,22 +720,6 @@ class Subroutine(override val name: String,
     override fun accept(visitor: AstWalker, parent: Node) = visitor.visit(this, parent)
     override fun toString() =
         "Subroutine(name=$name, parameters=$parameters, returntypes=$returntypes, ${statements.size} statements, address=$asmAddress)"
-
-    // code to provide the ability to reference asmsub parameters via qualified name:
-    private val asmParamsDecls = mutableMapOf<String, VarDecl>()
-
-    fun searchParameter(name: String): VarDecl? {
-        // TODO can we get rid of this routine? it makes temporary vardecls...
-        val existingDecl = asmParamsDecls[name]
-        if(existingDecl!=null)
-            return existingDecl
-
-        val param = parameters.firstOrNull {it.name==name} ?: return null
-        val decl = VarDecl.fromParameter(param)
-        decl.linkParents(this)
-        asmParamsDecls[name] = decl
-        return decl
-    }
 }
 
 open class SubroutineParameter(val name: String,