removed pythia adapter as per issue #1302 (#1332)

Author: Rishik00

transformer_lens/model_bridge/supported_architectures/__init__.py

@@ -135,9 +135,6 @@
 from transformer_lens.model_bridge.supported_architectures.phi3 import (
     Phi3ArchitectureAdapter,
 )
-from transformer_lens.model_bridge.supported_architectures.pythia import (
-    PythiaArchitectureAdapter,
-)
 from transformer_lens.model_bridge.supported_architectures.qwen import (
     QwenArchitectureAdapter,
 )
@@ -211,7 +208,6 @@
     "OptArchitectureAdapter",
     "PhiArchitectureAdapter",
     "Phi3ArchitectureAdapter",
-    "PythiaArchitectureAdapter",
     "QwenArchitectureAdapter",
     "Qwen2ArchitectureAdapter",
     "Qwen3ArchitectureAdapter",