Fix build warnings.

// FREEBIE

Signal/src/ViewControllers/DebugUI/DebugUIContacts.m

@@ -85,10 +85,9 @@ NS_ASSUME_NONNULL_BEGIN
         @"Paul",
         @"Bertha",
     ];
-    return values[arc4random_uniform(values.count)];
+    return values[(NSUInteger)arc4random_uniform((uint32_t)values.count)];
 }
 
-
 + (NSString *)randomLastName
 {
     NSArray<NSString *> *values = @[

Signal/src/views/OWSBezierPathView.h

@@ -2,7 +2,7 @@
 //  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
 //
 
-typedef void (^ConfigureShapeLayerBlock)(CAShapeLayer *layer, CGRect bounds);
+typedef void (^ConfigureShapeLayerBlock)(CAShapeLayer *_Nonnull layer, CGRect bounds);
 
 NS_ASSUME_NONNULL_BEGIN
 

Signal/src/views/OWSBezierPathView.m

@@ -106,12 +106,6 @@ NS_ASSUME_NONNULL_BEGIN
     return [NSString stringWithFormat:@"[%@]", self.class];
 }
 
-// TODO rename to logTag, tag is an existing UIView method.
-- (NSString *)tag
-{
-    return self.class.tag;
-}
-
 @end
 
 NS_ASSUME_NONNULL_END

Signal/src/views/TSUnreadIndicatorInteraction.m

@@ -10,8 +10,6 @@ NS_ASSUME_NONNULL_BEGIN
 
 @property (atomic) BOOL hasMoreUnseenMessages;
 
-- (instancetype)initWithTimestamp:(uint64_t)timestamp thread:(TSThread *)thread NS_DESIGNATED_INITIALIZER;
-
 @end
 
 #pragma mark -