Remove git_remote_supported_url wrapper

See libgit2/libgit2#2644.

Author: jspahrsummers

ObjectiveGit/GTRemote.h

@@ -62,9 +62,6 @@ typedef enum {
 /// `+refs/heads/*:refs/remotes/REMOTE/*`.
 @property (nonatomic, readonly, copy) NSArray *pushRefspecs;
 
-/// Tests if a URL is supported (e.g. it's a supported URL scheme)
-+ (BOOL)isSupportedURLString:(NSString *)URLString;
-
 /// Tests if a name is valid
 + (BOOL)isValidRemoteName:(NSString *)name;
 

ObjectiveGit/GTRemote.m

@@ -92,12 +92,6 @@ - (NSUInteger)hash {
 
 #pragma mark API
 
-+ (BOOL)isSupportedURLString:(NSString *)URLString {
-	NSParameterAssert(URLString != nil);
-
-	return git_remote_supported_url(URLString.UTF8String) == GIT_OK;
-}
-
 + (BOOL)isValidRemoteName:(NSString *)name {
 	NSParameterAssert(name != nil);