Remove unnecessary defineProperty guards.

test/test.js

@@ -7025,7 +7025,6 @@
       assert.expect(4);
 
       lodashStable.each(['a', ['a'], { 'a': 1 }, NaN], function(value) {
-        if (defineProperty) {
         var object = {},
             pass = true;
 
@@ -7038,10 +7037,6 @@
 
         func(object, { 'a': value });
         assert.ok(pass);
-        }
-        else {
-          skipAssert(assert);
-        }
       });
     });
   });
@@ -15196,7 +15191,6 @@
     QUnit.test('should skip merging when `object` and `source` are the same value', function(assert) {
       assert.expect(1);
 
-      if (defineProperty) {
       var object = {},
           pass = true;
 
@@ -15209,10 +15203,6 @@
 
       _.merge(object, object);
       assert.ok(pass);
-      }
-      else {
-        skipAssert(assert);
-      }
     });
 
     QUnit.test('should convert values to arrays when merging arrays of `source`', function(assert) {
@@ -20081,7 +20071,6 @@
       assert.expect(4);
 
       lodashStable.each(['a', ['a'], { 'a': 1 }, NaN], function(value) {
-        if (defineProperty) {
         var object = {},
             pass = true,
             updater = isUpdate ? lodashStable.constant(value) : value;
@@ -20095,10 +20084,6 @@
 
         func(object, 'a', updater);
         assert.ok(pass);
-        }
-        else {
-          skipAssert(assert);
-        }
       });
     });
   });
@@ -24906,7 +24891,7 @@
 
       var object = {};
 
-      if (!isStrict && defineProperty) {
+      if (!isStrict) {
         defineProperty(object, 'a', {
           'configurable': false,
           'enumerable': true,