Changing AnyFn to Function in places up until the runloop public API

packages/@ember/-internals/glimmer/lib/helpers/action.ts

@@ -351,33 +351,26 @@ function makeArgsProcessor(valuePathRef: Reference | false, actionArgsRef: Refer
   }
 }
 
-function isClosureAction(action: unknown): asserts action is string | AnyFn {
-  assert(
-    'action(ref) must be a string or function',
-    typeof action === 'string' || typeof action === 'function'
-  );
-  return;
-}
-
 function makeDynamicClosureAction(
   context: object,
   targetRef: Reference<MaybeActionHandler>,
   actionRef: Reference<unknown>,
   processArgs: (args: unknown[]) => unknown[],
   debugKey: string
 ) {
-  let action = valueForRef(actionRef);
+  const action = valueForRef(actionRef);
 
-  isClosureAction(action);
+  assert(
+    'action(ref) must be a string or function',
+    typeof action === 'string' || typeof action === 'function'
+  );
 
   // We don't allow undefined/null values, so this creates a throw-away action to trigger the assertions
   if (DEBUG) {
     makeClosureAction(context, valueForRef(targetRef), action, processArgs, debugKey);
   }
 
   return (...args: any[]) => {
-    isClosureAction(action);
-
     return makeClosureAction(
       context,
       valueForRef(targetRef),
@@ -389,18 +382,18 @@ function makeDynamicClosureAction(
 }
 
 interface MaybeActionHandler {
-  actions?: Record<string, AnyFn>;
+  actions?: Record<string, Function>;
 }
 
 function makeClosureAction(
   context: object,
   target: MaybeActionHandler,
-  action: string | AnyFn,
+  action: string | Function,
   processArgs: (args: unknown[]) => unknown[],
   debugKey: string
 ) {
   let self: object;
-  let fn: AnyFn;
+  let fn: Function;
 
   assert(
     `Action passed is null or undefined in (action) from ${target}.`,
@@ -429,7 +422,7 @@ function makeClosureAction(
   return (...args: any[]) => {
     let payload = { target: self, args, label: '@glimmer/closure-action' };
     return flaggedInstrument('interaction.ember-action', payload, () => {
-      return join(self, fn, ...processArgs(args));
+      return join(self, fn as AnyFn, ...processArgs(args));
     });
   };
 }