Remove an extra layer of wrapping for matchers/custom matchers

Helps reduce how nested custom matchers have to be for users as well as
Jasmine internal matchers

[#59161378]

spec/core/CustomMatchersSpec.js

@@ -10,10 +10,8 @@ describe("Custom Matchers (Integration)", function() {
     env.it('spec defining a custom matcher', function() {
       env.addMatchers({
         matcherForSpec: function() {
-          return {
-            compare: function(actual, expected) {
-              return { pass: false, message: "matcherForSpec: actual: " + actual + "; expected: " + expected };
-            }
+          return function(actual, expected) {
+            return { pass: false, message: "matcherForSpec: actual: " + actual + "; expected: " + expected };
           }
         }
       });
@@ -40,7 +38,7 @@ describe("Custom Matchers (Integration)", function() {
   it("passes the spec if the custom matcher passes", function(done) {
     env.addMatchers({
       toBeReal: function() {
-        return { compare: function() { return { pass: true }; } };
+        return function() { return { pass: true }; };
       }
     });
 
@@ -59,10 +57,8 @@ describe("Custom Matchers (Integration)", function() {
   it("generates messages with the same rules as built in matchers absent a custom message", function(done) {
     env.addMatchers({
       toBeReal: function() {
-        return {
-          compare: function() {
-            return { pass: false };
-          }
+        return function() {
+          return { pass: false };
         }
       }
     });
@@ -83,7 +79,7 @@ describe("Custom Matchers (Integration)", function() {
     var argumentSpy = jasmine.createSpy("argument spy").and.returnValue({ pass: true });
     env.addMatchers({
       toBeReal: function() {
-        return { compare: argumentSpy };
+        return argumentSpy;
       }
     });
 
@@ -104,7 +100,7 @@ describe("Custom Matchers (Integration)", function() {
   });
 
   it("passes the jasmine utility and current equality matchers to the expectation factory", function(done) {
-    var matcherFactory = function() { return { compare: function() { return {pass: true}; }}; },
+    var matcherFactory = function() { return function() { return { pass: true }; }; },
         argumentSpy = jasmine.createSpy("argument spy").and.returnValue(matcherFactory),
         customEqualityFn = function() { return true; };