Improvement of exception handling around proxies.

This patch fixes #303.

Indeed, before this patch, we were rising exceptions to prevent
unknown safe. This patch simply remove those exceptions because
the following conditions already handle a broad scopes of possible
problems.

Contributors:
  * @spirillen

PyFunceble/query/requests/adapter/base.py

@@ -123,12 +123,6 @@ def extract_extension(subject: str) -> Optional[str]:
             When the given :code:`subject` is an empty :py:class:`str`.
         """
 
-        if not isinstance(subject, str):
-            raise TypeError(f"<subject> should be {str}, type(subject) given.")
-
-        if not subject:
-            raise ValueError("<subject> should not be empty.")
-
         if "." not in subject:
             return None
 
@@ -177,12 +171,6 @@ def correct_input(pattern_input: dict) -> dict:
 
             return result
 
-        if not isinstance(subject, str):
-            raise TypeError(f"<subject> should be {str}, type(subject) given.")
-
-        if not subject:
-            raise ValueError("<subject> should not be empty.")
-
         extension = self.extract_extension(subject)
 
         proxies = {}