Revert "Adjust Qwen model ID in examples"

This reverts commit 62de815.

Author: ncoghlan

examples/tool-use-multiple.py

@@ -18,7 +18,7 @@ def is_prime(n: int) -> bool:
             return False
     return True
 
-model = lms.llm("qwen2.5-7b-instruct-1m")
+model = lms.llm("qwen2.5-7b-instruct")
 model.act(
     "Is the result of 12345 + 45668 a prime? Think step by step.",
     [add, is_prime],

examples/tool-use.py

@@ -7,7 +7,7 @@ def multiply(a: float, b: float) -> float:
     """Given two numbers a and b. Returns the product of them."""
     return a * b
 
-model = lms.llm("qwen2.5-7b-instruct-1m")
+model = lms.llm("qwen2.5-7b-instruct")
 model.act(
     "What is the result of 12345 multiplied by 54321?",
     [multiply],