Refactor requests import handling in download_regions.py

Removed the import error handling for the requests library and added the import statement at the top of the file.

Author: OMpawar-21

scripts/download_regions.py

@@ -11,6 +11,7 @@
 import json
 import os
 import sys
+import requests
 
 REGIONS_URL = 'https://artifacts.contentstack.com/regions.json'
 
@@ -24,15 +25,6 @@ def download():
     dest_dir = os.path.dirname(DEST)
     os.makedirs(dest_dir, exist_ok=True)
 
-    try:
-        import requests
-    except ImportError:
-        sys.stderr.write(
-            'contentstack: requests library not available. '
-            'Install dependencies first: pip install -r requirements.txt\n'
-        )
-        sys.exit(1)
-
     print(f'contentstack: Downloading regions.json from {REGIONS_URL} ...')
 
     try: