Remove getCollections method.

Mobile Buy SDK/Mobile Buy SDK Tests/BUYClientTest_Storefront.m

@@ -174,7 +174,7 @@
 	[OHHTTPStubs stubUsingResponseWithKey:@"testGetCollection_0" useMocks:[self shouldUseMocks]];
 	
 	XCTestExpectation *expectation = [self expectationWithDescription:NSStringFromSelector(_cmd)];
-	[self.client getCollections:^(NSArray *collections, NSError *error) {
+	[self.client getCollectionsPage:1 completion:^(NSArray<BUYCollection *> *collections, NSUInteger page, BOOL reachedEnd, NSError * _Nullable error) {
 		
 		XCTAssertNotNil(collections);
 		XCTAssertNil(error);

Mobile Buy SDK/Mobile Buy SDK/Data/BUYClient+Storefront.h

@@ -158,16 +158,7 @@ typedef void (^BUYDataProductListBlock)(NSArray<BUYProduct *> * _Nullable produc
  *
  *  @return The associated BUYRequestOperation
  */
-- (BUYRequestOperation *)getProductsByIds:(NSArray *)productIds completion:(BUYDataProductsBlock)block;
-
-/**
- *  Fetches the collections on the shop
- *
- *  @param block (^BUYDataCollectionsBlock)(NSArray *collections, NSError *error)
- *
- *  @return The associated BUYRequestOperation
- */
-- (BUYRequestOperation *)getCollections:(BUYDataCollectionsBlock)block;
+- (BUYRequestOperation *)getProductsByIds:(NSArray<NSString *> *)productIds completion:(BUYDataProductsBlock)block;
 
 /**
  *  Fetches collections based off page

Mobile Buy SDK/Mobile Buy SDK/Data/BUYClient+Storefront.m

@@ -112,13 +112,6 @@ static NSString * const BUYCollectionsKey = @"collection_listings";
 	}];
 }
 
-- (BUYRequestOperation *)getCollections:(BUYDataCollectionsBlock)block
-{
-	return [self getCollectionsPage:1 completion:^(NSArray<BUYCollection *> *collections, NSUInteger page, BOOL reachedEnd, NSError *error) {
-		block(collections, error);
-	}];
-}
-
 - (BUYRequestOperation *)getCollectionsPage:(NSUInteger)page completion:(BUYDataCollectionsListBlock)block
 {
 	NSURL *url  = [self urlForCollectionListingsWithParameters:@{