Don't log these errors

The processes migh have naturally ended before this code is executed, so there's no need to print this as an error.

Author: alahiff

simvue/metrics.py

@@ -13,8 +13,8 @@ def get_process_memory(processes):
     for process in processes:
         try:
             rss += process.memory_info().rss/1024/1024
-        except Exception as err:
-            logger.error(str(err))
+        except:
+            pass
 
     return rss
 
@@ -26,8 +26,8 @@ def get_process_cpu(processes):
     for process in processes:
         try:
             cpu_percent += process.cpu_percent()
-        except Exception as err:
-            logger.error(str(err))
+        except:
+            pass
 
     return cpu_percent