[iOS] Move radians/degrees conversion functions to MGLGeometry.h

include/mbgl/ios/MGLGeometry.h

@@ -3,6 +3,7 @@
 #import "MGLTypes.h"
 
 #import <CoreLocation/CoreLocation.h>
+#import <CoreGraphics/CGBase.h>
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -82,4 +83,14 @@ NS_INLINE NSString *MGLStringFromCoordinateBounds(MGLCoordinateBounds bounds) {
             bounds.ne.latitude, bounds.ne.longitude];
 }
 
+NS_INLINE CGFloat MGLRadiansFromDegrees(CLLocationDegrees degrees)
+{
+    return degrees * M_PI / 180;
+}
+
+NS_INLINE CLLocationDegrees MGLDegreesFromRadians(CGFloat radians)
+{
+    return radians * 180 / M_PI;
+}
+
 NS_ASSUME_NONNULL_END

platform/ios/MGLMapView.mm

@@ -60,16 +60,6 @@ static NSURL *MGLURLForBundledStyleNamed(NSString *styleName)
     return [NSURL URLWithString:[NSString stringWithFormat:@"asset://styles/%@.json", styleName]];
 }
 
-CGFloat MGLRadiansFromDegrees(CLLocationDegrees degrees)
-{
-    return degrees * M_PI / 180;
-}
-
-CLLocationDegrees MGLDegreesFromRadians(CGFloat radians)
-{
-    return radians * 180 / M_PI;
-}
-
 mbgl::util::UnitBezier MGLUnitBezierForMediaTimingFunction(CAMediaTimingFunction *function)
 {
     if ( ! function)

platform/ios/MGLUserLocationAnnotationView.m

@@ -144,16 +144,6 @@ const CGFloat MGLUserLocationAnnotationArrowSize = MGLUserLocationAnnotationPuck
     }
 }
 
-CGFloat MGLRadiansFromDegrees(CLLocationDegrees degrees)
-{
-    return degrees * M_PI / 180;
-}
-
-CLLocationDegrees MGLDegreesFromRadians(CGFloat radians)
-{
-    return radians * 180 / M_PI;
-}
-
 - (UIBezierPath *)puckArrow
 {
     CGFloat max = MGLUserLocationAnnotationArrowSize;