fix: remove broken link in Python37DeprecationWarning (#1430)

Co-authored-by: arithmetic1728 <[email protected]>

Author: parthea

google/auth/__init__.py

@@ -35,8 +35,7 @@
 class Python37DeprecationWarning(DeprecationWarning):  # pragma: NO COVER
     """
     Deprecation warning raised when Python 3.7 runtime is detected.
-    Python 3.7 support will be dropped after January 1, 2024. See
-    https://cloud.google.com/python/docs/python37-sunset/ for more information.
+    Python 3.7 support will be dropped after January 1, 2024.
     """
 
     pass
@@ -46,8 +45,7 @@ class Python37DeprecationWarning(DeprecationWarning):  # pragma: NO COVER
 if sys.version_info.major == 3 and sys.version_info.minor == 7:  # pragma: NO COVER
     message = (
         "After January 1, 2024, new releases of this library will drop support "
-        "for Python 3.7. More details about Python 3.7 support "
-        "can be found at https://cloud.google.com/python/docs/python37-sunset/"
+        "for Python 3.7."
     )
     warnings.warn(message, Python37DeprecationWarning)
 

google/oauth2/__init__.py

@@ -21,8 +21,7 @@
 class Python37DeprecationWarning(DeprecationWarning):  # pragma: NO COVER
     """
     Deprecation warning raised when Python 3.7 runtime is detected.
-    Python 3.7 support will be dropped after January 1, 2024. See
-    https://cloud.google.com/python/docs/python37-sunset/ for more information.
+    Python 3.7 support will be dropped after January 1, 2024.
     """
 
     pass
@@ -32,7 +31,6 @@ class Python37DeprecationWarning(DeprecationWarning):  # pragma: NO COVER
 if sys.version_info.major == 3 and sys.version_info.minor == 7:  # pragma: NO COVER
     message = (
         "After January 1, 2024, new releases of this library will drop support "
-        "for Python 3.7. More details about Python 3.7 support "
-        "can be found at https://cloud.google.com/python/docs/python37-sunset/"
+        "for Python 3.7."
     )
     warnings.warn(message, Python37DeprecationWarning)