Fix context_params struct layout

Author: abetlen

llama_cpp/llama_cpp.py

@@ -188,8 +188,6 @@ class llama_context_params(Structure):
     _fields_ = [
         ("seed", c_uint32),
         ("n_ctx", c_int32),
-        ("rope_freq_base", c_float),
-        ("rope_freq_scale", c_float),
         ("n_batch", c_int32),
         ("n_gpu_layers", c_int32),
         ("main_gpu", c_int32),