Remove seed from ImageGenerationParameters

Author: andrewheard

FirebaseVertexAI/Sources/Types/Internal/Imagen/ImageGenerationParameters.swift

@@ -16,7 +16,6 @@
 struct ImageGenerationParameters {
   let sampleCount: Int?
   let storageURI: String?
-  let seed: Int32?
   let negativePrompt: String?
   let aspectRatio: String?
   let safetyFilterLevel: String?
@@ -36,7 +35,6 @@ extension ImageGenerationParameters: Encodable {
   enum CodingKeys: String, CodingKey {
     case sampleCount
     case storageURI = "storageUri"
-    case seed
     case negativePrompt
     case aspectRatio
     case safetyFilterLevel = "safetySetting"
@@ -50,7 +48,6 @@ extension ImageGenerationParameters: Encodable {
     var container = encoder.container(keyedBy: CodingKeys.self)
     try container.encodeIfPresent(sampleCount, forKey: .sampleCount)
     try container.encodeIfPresent(storageURI, forKey: .storageURI)
-    try container.encodeIfPresent(seed, forKey: .seed)
     try container.encodeIfPresent(negativePrompt, forKey: .negativePrompt)
     try container.encodeIfPresent(aspectRatio, forKey: .aspectRatio)
     try container.encodeIfPresent(safetyFilterLevel, forKey: .safetyFilterLevel)

FirebaseVertexAI/Sources/Types/Public/Imagen/ImagenModel.swift

@@ -86,11 +86,9 @@ public final class ImagenModel {
   func imageGenerationParameters(storageURI: String?,
                                  generationConfig: ImagenGenerationConfig? = nil)
     -> ImageGenerationParameters {
-    // TODO(#14221): Add support for configuring remaining parameters.
     return ImageGenerationParameters(
       sampleCount: generationConfig?.numberOfImages ?? 1,
       storageURI: storageURI,
-      seed: nil,
       negativePrompt: generationConfig?.negativePrompt,
       aspectRatio: generationConfig?.aspectRatio?.rawValue,
       safetyFilterLevel: safetySettings?.safetyFilterLevel?.rawValue,

FirebaseVertexAI/Tests/Unit/Types/Imagen/ImageGenerationParametersTests.swift

@@ -29,7 +29,6 @@ final class ImageGenerationParametersTests: XCTestCase {
   func testEncodeParameters_allSpecified() throws {
     let sampleCount = 4
     let storageURI = "gs://bucket/folder"
-    let seed: Int32 = 1_076_107_968
     let negativePrompt = "test-negative-prompt"
     let aspectRatio = "16:9"
     let safetyFilterLevel = "block_low_and_above"
@@ -41,7 +40,6 @@ final class ImageGenerationParametersTests: XCTestCase {
     let parameters = ImageGenerationParameters(
       sampleCount: sampleCount,
       storageURI: storageURI,
-      seed: seed,
       negativePrompt: negativePrompt,
       aspectRatio: aspectRatio,
       safetyFilterLevel: safetyFilterLevel,
@@ -66,7 +64,6 @@ final class ImageGenerationParametersTests: XCTestCase {
       "personGeneration" : "\(personGeneration)",
       "safetySetting" : "\(safetyFilterLevel)",
       "sampleCount" : \(sampleCount),
-      "seed" : \(seed),
       "storageUri" : "\(storageURI)"
     }
     """)
@@ -80,7 +77,6 @@ final class ImageGenerationParametersTests: XCTestCase {
     let parameters = ImageGenerationParameters(
       sampleCount: sampleCount,
       storageURI: nil,
-      seed: nil,
       negativePrompt: nil,
       aspectRatio: aspectRatio,
       safetyFilterLevel: safetyFilterLevel,
@@ -107,7 +103,6 @@ final class ImageGenerationParametersTests: XCTestCase {
     let parameters = ImageGenerationParameters(
       sampleCount: nil,
       storageURI: nil,
-      seed: nil,
       negativePrompt: nil,
       aspectRatio: nil,
       safetyFilterLevel: nil,

FirebaseVertexAI/Tests/Unit/Types/Imagen/ImageGenerationRequestTests.swift

@@ -28,7 +28,6 @@ final class ImageGenerationRequestTests: XCTestCase {
   lazy var parameters = ImageGenerationParameters(
     sampleCount: sampleCount,
     storageURI: nil,
-    seed: nil,
     negativePrompt: nil,
     aspectRatio: aspectRatio,
     safetyFilterLevel: safetyFilterLevel,