Remove link to team documentation requirements page from team repository guide and update outdated information

Author: ReikoR

modules/ROOT/pages/gitlab-guide.adoc

@@ -7,9 +7,6 @@
 
 === Directory structure
 
-Refer to xref:team-documentation-requirements.adoc#_team_repository_structure[Team repository structure]
-for more information on team repository documentation.
-
 * `/` - general documentation
 * `software/` - robot's code
 * `electronics/` - electronics design
@@ -73,11 +70,11 @@ then the team gets the task approved.
 ==== Electronics
 
 * `electronics` branch should be used.
-* Instructors should be notified in Slack,
+* Instructors should be notified
 when the team would like feedback on preliminary design or review of completed design.
 * Design will be reviewed by instructors and feedback will be given as GitLab issues.
 * All issues need to be resolved.
-If the issues are resolved, instructors should be notified in Slack for reviewing the design again.
+If the issues are resolved, instructors should be notified for reviewing the design again.
 Issues should not be closed by team members.
 Instructors will close the issues when they have been resolved.
 * If the final review has been completed and there are no more issues,
@@ -86,12 +83,12 @@ then the design tasks are completed and the PCBs will be ordered by instructors.
 
 ==== Mechanics
 
-* Mechanics design must be created in Fusion 360.
-* Instructors should be notified in Slack,
+* Mechanics design must be created in Autodesk Fusion.
+* Instructors should be notified
 when the team would like feedback on preliminary design or review of completed design.
 * Design will be reviewed by instructors and feedback will be given as GitLab issues.
 * All issues need to be resolved.
-If the issues are resolved, instructors should be notified in Slack for reviewing the design again.
+If the issues are resolved, instructors should be notified for reviewing the design again.
 Issues should not be closed by team members.
 Instructors will close the issues when they have been resolved.
 * If the final review has been completed and there are no more issues,