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/toThrow.js

@@ -1,44 +1,42 @@
 getJasmineRequireObj().toThrow = function(j$) {
 
   function toThrow(util) {
-    return {
-      compare: function(actual, expected) {
-        var result = { pass: false },
-          threw = false,
-          thrown;
+    return function(actual, expected) {
+      var result = { pass: false },
+      threw = false,
+      thrown;
 
-        if (typeof actual != "function") {
-          throw new Error("Actual is not a Function");
-        }
+      if (typeof actual != "function") {
+        throw new Error("Actual is not a Function");
+      }
 
-        try {
-          actual();
-        } catch (e) {
-          threw = true;
-          thrown = e;
-        }
+      try {
+        actual();
+      } catch (e) {
+        threw = true;
+        thrown = e;
+      }
 
-        if (!threw) {
-          result.message = "Expected function to throw an exception.";
-          return result;
-        }
+      if (!threw) {
+        result.message = "Expected function to throw an exception.";
+        return result;
+      }
 
-        if (arguments.length == 1) {
-          result.pass = true;
-          result.message = "Expected function not to throw, but it threw " + j$.pp(thrown) + ".";
-
-          return result;
-        }
-
-        if (util.equals(thrown, expected)) {
-          result.pass = true;
-          result.message = "Expected function not to throw " + j$.pp(expected) + ".";
-        } else {
-          result.message = "Expected function to throw " + j$.pp(expected) + ", but it threw " +  j$.pp(thrown) + ".";
-        }
+      if (arguments.length == 1) {
+        result.pass = true;
+        result.message = "Expected function not to throw, but it threw " + j$.pp(thrown) + ".";
 
         return result;
       }
+
+      if (util.equals(thrown, expected)) {
+        result.pass = true;
+        result.message = "Expected function not to throw " + j$.pp(expected) + ".";
+      } else {
+        result.message = "Expected function to throw " + j$.pp(expected) + ", but it threw " +  j$.pp(thrown) + ".";
+      }
+
+      return result;
     };
   }