Remove unused code
Remove last duplicate unset
Query grammar should not explode segments on alias
ease saving of models without updating timestamps
Remove useless $app arguments in bindShared
Only propagate the touchOwners call if a relationship exists
fix memory leak in QueryBuilder/JoinBuilder
Merge pull request #5846 from lucasmichot/4.2-bindShared-app

[4.2] Service providers : remove useless $app argument in bindShared
Merge pull request #5840 from alprs/feature/save-wo-timestamps

[4.2] Ease saving of models without updating timestamps
fix conflicts.
Merge pull request #5837 from bishopb/4.2

Query grammar should not explode segments on alias
Merge pull request #5825 from joegreen0991/db-memory-leak-fix

Db memory leak fix #5568
Merge pull request #5817 from lucasmichot/4.2-duplicate-unset

[4.2] Database : remove last duplicate unset
Fixing conflicts.