QCoreTextFontDatabase: Remove number type asserts.

On iOS 8, the value 0 is returned as a kCFNumberIntType.
The code still works - CFNumberGetValue converts it
to a 0.0 double.

Change-Id: Ic50900b22e4fa19ad1481e8e0e293559bbfd8cd2
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>

src/platformsupport/fontdatabases/mac/qcoretextfontdatabase.mm

@@ -264,7 +264,6 @@ static void getFontDescription(CTFontDescriptorRef font, FontDescription *fd)
 
     if (styles) {
         if (CFNumberRef weightValue = (CFNumberRef) CFDictionaryGetValue(styles, kCTFontWeightTrait)) {
-            Q_ASSERT(CFNumberIsFloatType(weightValue));
             double normalizedWeight;
             if (CFNumberGetValue(weightValue, kCFNumberDoubleType, &normalizedWeight)) {
                 if (normalizedWeight >= 0.62)
@@ -280,7 +279,6 @@ static void getFontDescription(CTFontDescriptorRef font, FontDescription *fd)
             }
         }
         if (CFNumberRef italic = (CFNumberRef) CFDictionaryGetValue(styles, kCTFontSlantTrait)) {
-            Q_ASSERT(CFNumberIsFloatType(italic));
             double d;
             if (CFNumberGetValue(italic, kCFNumberDoubleType, &d)) {
                 if (d > 0.0)