chore: Remove debug meta decodable V9 checks

Author: noahsmartin

Sources/Swift/Protocol/Codable/SentryDebugMetaCodable.swift

@@ -1,15 +1,12 @@
 @_implementationOnly import _SentryPrivate
 import Foundation
 
-#if SDK_V9
 final class DebugMetaDecodable: DebugMeta {
     convenience public init(from decoder: any Decoder) throws {
         try self.init(decodedFrom: decoder)
     }
 }
-#else
-typealias DebugMetaDecodable = DebugMeta
-#endif
+
 extension DebugMetaDecodable: Decodable {
 
     private enum CodingKeys: String, CodingKey {
@@ -22,12 +19,6 @@ extension DebugMetaDecodable: Decodable {
         case imageVmAddress = "image_vmaddr"
         case codeFile = "code_file"
     }
-    
-    #if !SDK_V9
-    required convenience public init(from decoder: any Decoder) throws {
-        try self.init(decodedFrom: decoder)
-    }
-    #endif
 
     private convenience init(decodedFrom decoder: Decoder) throws {
         let container = try decoder.container(keyedBy: CodingKeys.self)