Fix import error: remove non-existent configure_gemini from import

app.py

@@ -39,7 +39,7 @@ from sentinelhub import (
 from vegetation_indices import INDEX_FUNCTIONS, calculate_all_indices
 from stress_detection_model import StressDetectionModel, get_stress_category, prepare_llm_context
 from stress_detection_preprocessing import preprocess_for_model
-from llm_analysis import configure_gemini, prepare_indices_context, format_stress_context
+from llm_analysis import prepare_indices_context, format_stress_context
 
 # ============================================================================
 # LOGGING