Final removal of original boto SDK (ansible-collections#898)

[Breaking Change] Final removal of original boto SDK

SUMMARY

Remove old boto based inventory script
Clean up requirements
Clean up random comments in docs/comments

ISSUE TYPE

Feature Pull Request

COMPONENT NAME
scripts/inventory/ec2.py
requirements.txt
test-requirements.txt
tests/integration/requirements.txt
tests/unit/requirements.txt
ADDITIONAL INFORMATION

Reviewed-by: Alina Buzachis <None>

This commit was initially merged in https://github.com/ansible-collections/community.aws
See: ansible-collections@00037be

plugins/modules/iam_server_certificate.py

@@ -86,8 +86,6 @@
 extends_documentation_fragment:
 - amazon.aws.aws
 - amazon.aws.ec2
-requirements:
-- boto >= 2.49.0
 '''
 
 EXAMPLES = '''