Remove use of debtcollector

We are not using any of the advanced functionality provided by this
library. Replace with warnings instead.

Change-Id: Iedc00b36707de2dfc8eb4e04027e735b1c7b6add
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

oslo_cache/_bmemcache_pool.py

@@ -15,7 +15,7 @@
 
 """Thread-safe connection pool for python-binary-memcached."""
 
-import debtcollector
+import warnings
 
 try:
     import eventlet
@@ -29,8 +29,10 @@ LOG = log.getLogger(__name__)
 
 
 if eventlet and eventlet.patcher.is_monkey_patched('thread'):
-    debtcollector.deprecate(
-        "Eventlet support is deprecated and will be removed."
+    warnings.warn(
+        "Eventlet support is deprecated and will be removed.",
+        category=DeprecationWarning,
+        stacklevel=3,
     )
 
 

oslo_cache/_memcache_pool.py

@@ -21,8 +21,7 @@ import itertools
 import queue
 import threading
 import time
-
-import debtcollector
+import warnings
 
 try:
     import eventlet
@@ -39,8 +38,10 @@ LOG = log.getLogger(__name__)
 
 
 if eventlet and eventlet.patcher.is_monkey_patched('thread'):
-    debtcollector.deprecate(
-        "Eventlet support is deprecated and will be removed."
+    warnings.warn(
+        "Eventlet support is deprecated and will be removed.",
+        category=DeprecationWarning,
+        stacklevel=3,
     )
 
 

requirements.txt

@@ -7,4 +7,3 @@ oslo.config>=8.1.0 # Apache-2.0
 oslo.i18n>=5.0.0 # Apache-2.0
 oslo.log>=4.2.1 # Apache-2.0
 oslo.utils>=4.2.0 # Apache-2.0
-debtcollector>=3.0.0 # Apache-2.0