[FIX] Module Awesome_Gallery setup creates error

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Steps to Reproduce:
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1. Checkout the origin/18.0 branch for the tutorial repo and install the Awesome_Gallery module.
2. Try to reconnect, you get and error with following traceback: `... File "/home/odoo/work/odoo/addons/web/models/ir_ui_view.py", line 14, in <dictcomp> 'icon': _view_info[type_]['icon'], KeyError: 'gallery' `
3. Try applying the first step of solution 6.1 from the origin/18.0-solutions branch. The error persists and you cannot do the tutorial.

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After this commit:
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The module can be installed without errors, and you can proceed with the tutorial without issues.
Note: The 18.0-solutions branch should be updated with the new v18 tutorial, which now focuses on the Contact app instead of the Awesome_Tshirt app.

task-xxxx

Author: CorentinVermeulen

Diff for: awesome_gallery/models/ir_ui_view.py

@@ -11,4 +11,3 @@ def _get_view_info(self):
         infos = super()._get_view_info()
         infos['gallery'] = {'icon': 'fa fa-image'}
         return infos
-