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]

src/core/matchers/toMatch.js

@@ -1,14 +1,12 @@
 getJasmineRequireObj().toMatch = function() {
 
   function toMatch() {
-    return {
-      compare: function(actual, expected) {
-        var regexp = new RegExp(expected);
+    return function(actual, expected) {
+      var regexp = new RegExp(expected);
 
-        return {
-          pass: regexp.test(actual)
-        };
-      }
+      return {
+        pass: regexp.test(actual)
+      };
     };
   }