[BACKPORT 2.20][#22037] docdb: Remove log spam generated by deleted c…

…olocated tables

Summary:
When a colocated table is deleted, the metadata entity holding its metadata has its tablet maps cleared. However the metadata entry is never removed from the tables_ map in the catalog manager. There is a background task that loops through this tables_ map and calls a method which prints a log line when a colocated table has no backing tablet. YBM has run into issues with log spam due to this behaviour.

This diff simply removes the log line. I filed #23721 to track removing tables from the tables_ map on deletion.
Jira: DB-10954

Original commit: bb74fb6 / D37646

Test Plan: n/a

Reviewers: mhaddad

Reviewed By: mhaddad

Subscribers: ybase, slingam

Differential Revision: https://phorge.dev.yugabyte.com/D37687

src/yb/master/catalog_entity_info.cc

@@ -1027,7 +1027,6 @@ TabletInfoPtr TableInfo::GetColocatedUserTablet() const {
   if (!tablets_.empty()) {
     return tablets_.begin()->second;
   }
-  LOG(INFO) << "Colocated Tablet not found for table " << name();
   return nullptr;
 }