Delete the loadCustomer action since we don't use it anymore

Author: RafaelKayumov

Modules/Sources/Yosemite/Actions/CustomerAction.swift

@@ -100,7 +100,4 @@ public enum CustomerAction: Action {
     ///- `siteID`: The site for which customers should be delete.
     ///- `onCompletion`: Invoked when the operation finishes.
     case deleteAllCustomers(siteID: Int64, onCompletion: () -> Void)
-
-    /// Loads a customer for the specified `siteID` and `customerID` from storage.
-    case loadCustomer(siteID: Int64, customerID: Int64, onCompletion: (Result<Customer, Error>) -> Void)
 }

Modules/Sources/Yosemite/Stores/CustomerStore.swift

@@ -80,8 +80,6 @@ public final class CustomerStore: Store {
             synchronizeAllCustomers(siteID: siteID, pageNumber: pageNumber, pageSize: pageSize, onCompletion: onCompletion)
         case .deleteAllCustomers(siteID: let siteID, onCompletion: let onCompletion):
             deleteAllCustomers(from: siteID, onCompletion: onCompletion)
-        case let .loadCustomer(siteID, customerID, onCompletion):
-            loadCustomer(siteID: siteID, customerID: customerID, onCompletion: onCompletion)
         }
     }
 
@@ -253,16 +251,6 @@ public final class CustomerStore: Store {
         }, completion: onCompletion, on: .main)
     }
 
-    private func loadCustomer(siteID: Int64, customerID: Int64, onCompletion: @escaping (Result<Networking.Customer, Error>) -> Void) {
-        let customers = storageManager.viewStorage.loadCustomers(siteID: siteID, matching: [customerID])
-        if let storageCustomer = customers.first {
-            let customer = storageCustomer.toReadOnly()
-            onCompletion(.success(customer))
-        } else {
-            onCompletion(.failure(CustomerStoreError.notFound))
-        }
-    }
-
     /// Maps CustomerSearchResult to Customer objects
     ///
     /// - Parameters: