Remove usage of str.removesuffix()

The removesuffix attribute is only available from Python 3.9+

Signed-off-by: Ayan Sinha Mahapatra <ayansmahapatra@gmail.com>

Author: AyanSinhaMahapatra

src/packagedcode/swift.py

@@ -418,7 +418,7 @@ def get_dependencies(dependencies):
 def get_namespace_and_name(url):
     parsed_url = parse.urlparse(url)
     hostname = parsed_url.hostname
-    path = parsed_url.path.removesuffix(".git")
+    path = parsed_url.path.replace(".git", "")
     canonical_name = hostname + path
 
     return canonical_name.rsplit("/", 1)