Avoid unnecessary default-func delegator generation for interfaces

bbq/compiler/desugar.go

@@ -1231,17 +1231,6 @@ func (d *Desugar) VisitInterfaceDeclaration(declaration *ast.InterfaceDeclaratio
 		d.modifiedDeclarations = append(d.modifiedDeclarations, desugaredMember)
 	}
 
-	// Add inherited default functions.
-	existingFunctions := declaration.Members.FunctionsByIdentifier()
-	inheritedDefaultFuncs := d.inheritedDefaultFunctions(
-		interfaceType,
-		existingFunctions,
-		declaration.StartPos,
-		declaration.Range,
-	)
-
-	d.modifiedDeclarations = append(d.modifiedDeclarations, inheritedDefaultFuncs...)
-
 	// TODO: Optimize: If none of the existing members got updated or,
 	// if there are no inherited members, then return the same declaration as-is.
 

interpreter/function_test.go

@@ -323,36 +323,3 @@ func TestInterpretFunctionSubtyping(t *testing.T) {
 		result,
 	)
 }
-
-func TestInterpretDefaultFunctionWithConditions(t *testing.T) {
-
-	t.Parallel()
-
-	inter, getLogs, err := parseCheckAndInterpretWithLogs(t, `
-            struct interface Foo {
-                fun test(_ a: Int) {
-                    log("Calling to Foo.test")
-                }
-            }
-
-            struct interface Bar: Foo {
-                fun test(_ a: Int) {
-                    pre {
-                        a > 10: "a must be greater than 10"
-                    }
-                }
-            }
-
-            struct Test: Bar {}
-
-            fun main() {
-               Test().test(12)
-            }`,
-	)
-
-	_, err = inter.Invoke("main")
-	require.NoError(t, err)
-
-	logs := getLogs()
-	require.Empty(t, logs)
-}