Removed deprecated Gemini models and updated to the latest ones.

Author: dupl

app/constant.ts

@@ -544,7 +544,6 @@ const googleModels = [
   "gemini-1.5-flash",
   "gemini-1.5-flash-8b",
   "gemini-1.5-flash-002",
-  "learnlm-1.5-pro-experimental",
   "gemini-exp-1206",
   "gemini-2.0-flash",
   "gemini-2.0-flash-exp",
@@ -554,7 +553,10 @@ const googleModels = [
   "gemini-2.0-flash-thinking-exp-01-21",
   "gemini-2.0-pro-exp",
   "gemini-2.0-pro-exp-02-05",
-  "gemini-2.5-pro-preview-06-05",
+  "gemini-2.5-pro",
+  "gemini-2.5-flash",
+  "gemini-2.5-flash-lite-preview-06-17",
+  "learnlm-2.0-flash-experimental",
 ];
 
 const anthropicModels = [