Revert "Add debug logging for MySQL version-aware reparent logic"

This reverts commit 4bfe9c5.

Author: ejortegau

go/vt/vtctl/reparentutil/emergency_reparenter.go

@@ -418,7 +418,6 @@ func (erp *EmergencyReparenter) findMostAdvanced(
 			v = unknownVersion
 		}
 		mysqlVersions[i] = v
-		log.Infof("finding intermediate source - candidate %v has MySQL version %d.%d.%d", tablet.Alias, v.Major, v.Minor, v.Patch)
 	}
 
 	// sort the tablets for finding the best intermediate source in ERS — position first to minimize data loss

go/vt/vtctl/reparentutil/util.go

@@ -173,20 +173,13 @@ func ElectNewPrimary(
 		return nil, vterrors.Errorf(vtrpc.Code_INTERNAL, "cannot find a tablet to reparent to%v", reasonsToInvalidate.String())
 	}
 
-	for i, tablet := range validTablets {
-		if i < len(mysqlVersions) {
-			log.Infof("ElectNewPrimary: candidate %v has MySQL version %d.%d.%d", topoproto.TabletAliasString(tablet.Alias), mysqlVersions[i].Major, mysqlVersions[i].Minor, mysqlVersions[i].Patch)
-		}
-	}
-
 	// sort preferred tablets for finding the best primary — PRS prefers version over position
 	// because it always catches the elected tablet up to the old primary's exact position.
 	err = sortTabletsForReparent(validTablets, tabletPositions, innodbBufferPool, mysqlVersions, opts.durability, SortForPRS)
 	if err != nil {
 		return nil, err
 	}
 
-	log.Infof("ElectNewPrimary: elected %v as new primary candidate", topoproto.TabletAliasString(validTablets[0].Alias))
 	return validTablets[0].Alias, nil
 }
 
@@ -438,16 +431,11 @@ func findCandidate(
 	if sourceVersion.IsSameRelease(bestVersion) {
 		for _, candidate := range possibleCandidates {
 			if topoproto.TabletAliasEqual(intermediateSource.Alias, candidate.Alias) {
-				log.Infof("findCandidate: preferring intermediate source %v (version %d.%d) over lowest-version candidate %v (version %d.%d) — same release",
-					topoproto.TabletAliasString(candidate.Alias), sourceVersion.Major, sourceVersion.Minor,
-					topoproto.TabletAliasString(best.Alias), bestVersion.Major, bestVersion.Minor)
 				return candidate
 			}
 		}
 	}
 
-	log.Infof("findCandidate: selected %v with lowest MySQL version %d.%d",
-		topoproto.TabletAliasString(best.Alias), bestVersion.Major, bestVersion.Minor)
 	return best
 }