Revert "Adding the marker clustering for the google map"

This reverts commit 825ce76ebda1b42de3259f4416b5e6d33fd34727.
Merge commit '5e5053fdb4c7812fc8549a190fc3e16216a89e9d' into clustering
Modification of the zoom animation
Merge branch 'master' of https://github.com/Wallkers/Wallk