Revert "Merge pull request #7430 from vector-im/andy/user_trust"

This reverts commit 7f5d3b46eb02a7801d4a7c781762eea3d16ee0e6, reversing
changes made to 5a3adde8f70daec795ac1bee17c5159a155c6106.

Riot/Modules/Encryption/EncryptionTrustLevel.swift

@@ -1,49 +0,0 @@
-// 
-// Copyright 2023 New Vector Ltd
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-import Foundation
-
-/// Object responsible for calculating user and room trust level
-@objc class EncryptionTrustLevel: NSObject {
-    
-    /// Calculate trust level for a single user given their cross-signing info
-    @objc func userTrustLevel(
-        crossSigning: MXCrossSigningInfo?,
-        devicesTrust: MXTrustSummary
-    ) -> UserEncryptionTrustLevel {
-        
-        // If we could cross-sign but we haven't, the user is simply not verified
-        if let crossSigning, !crossSigning.isVerified {
-            return .notVerified
-        
-        // If we cannot cross-sign the user (legacy behaviour) and have not signed
-        // any devices manually, the user is not verified
-        } else if crossSigning == nil && devicesTrust.trustedCount == 0 {
-            return .notVerified
-        }
-        
-        // In all other cases we check devices for trust level
-        return devicesTrust.areAllTrusted ? .trusted : .warning
-    }
-    
-    /// Calculate trust level for a room given trust level of users and their devices
-    @objc func roomTrustLevel(summary: MXUsersTrustLevelSummary) -> RoomEncryptionTrustLevel {
-        guard summary.usersTrust.totalCount > 0 && summary.usersTrust.areAllTrusted else {
-            return .normal
-        }
-        return summary.devicesTrust.areAllTrusted ? .trusted : .warning
-    }
-}