fix: Unify Prompts (#254)

* remove cot
* fix prompt template
* fix pool matrix
* spiral matrix fixed

reasoning_gym/algorithmic/base_conversion.py

@@ -10,19 +10,6 @@ QUESTION_TEMPLATE = """Your task is to convert a number between two different ba
 
 If the target base is > 10, use lowercase letters a-z for digits above 9.
 
-Example:
-- Input: Convert the base-9 number 440 to base-5
-- Output: 2420
-- Explanation
-    - First, we convert the base-9 number 440 to base-10: 4 * 9**2 + 4 * 9**1 + 0 * 9**0 = 324 + 36 + 0 = 360
-    - Next, we convert the base-10 number 360 to base-5:
-        - 360 // 5 = 72 remainder 0
-        - 72 // 5 = 14 remainder 2
-        - 14 // 5 = 2 remainder 4
-        - 2 // 5 = 0 remainder 2
-    - Reading the remainders in reverse order gives us the base-5 number 2 4 2 0
-    - Hence, the final answer is 2420
-
 Now, convert the {source_name} number {source_repr} to {target_name}
 """