remove some not actually testing files

prompts/test.txt

@@ -1 +0,0 @@
-hello world

test.py

@@ -1,3 +0,0 @@
-# Python 3
-# Calculate the mean distance between an array of points
-

test.txt

@@ -1,14 +0,0 @@
-> write some python to parse a timestamp
-
-```
-import datetime
-
-def parse_timestamp(timestamp):
-    return datetime.datetime.fromtimestamp(timestamp)
-
-timestamp = 1561528231
-parsed_timestamp = parse_timestamp(timestamp)
-print(f"Parsed timestamp: {parsed_timestamp}")
-
-# Output: Parsed timestamp: 2019-06-26 16:47:11
-```