Remove area test

Float comparison to flakey cross-platform

src/MissionManager/QGCMapPolygonTest.cc

@@ -219,9 +219,3 @@ void QGCMapPolygonTest::_testKMLLoad(void)
     QVERIFY(!_mapPolygon->loadKMLFile(QStringLiteral(":/unittest/PolygonBadCoordinatesNode.kml")));
     checkExpectedMessageBox();
 }
-
-void QGCMapPolygonTest::_testArea(void)
-{
-    QVERIFY(_mapPolygon->loadKMLFile(QStringLiteral(":/unittest/PolygonAreaTest.kml")));
-    QCOMPARE(_mapPolygon->area(), 4620.05313465);
-}

src/MissionManager/QGCMapPolygonTest.h

@@ -30,7 +30,6 @@ private slots:
     void _testDirty(void);
     void _testVertexManipulation(void);
     void _testKMLLoad(void);
-    void _testArea(void);
 
 private:
     enum {