[ECS] Cleaning up incorrect invalid ECS field usages at root-level

[kgeller]

What does this PR do?

Removing the unused and incorrect ECS field usages at the root-level for the following packages:

• azure_frontdoor
• carbonblack_edr
• cisco_meraki
• juniper_srx
• netflow

Note: this is purely a docs change

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.

Related issues

• Relates Invalid ECS field usages at root-level #7808

[elasticmachine]

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Build stats

• Start Time: 2023-09-26T17:50:17.863+0000

• Duration: 18 min 17 sec

Test stats 🧪

Test	Results
Failed	0
Passed	64
Skipped	0
Total	64

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[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (7/7)	💚
Files	100.0% (21/21)	💚
Classes	100.0% (21/21)	💚
Methods	97.688% (169/173)	👍 9.809
Lines	80.549% (4195/5208)	👎 -14.742
Conditionals	100.0% (0/0)	💚

[elasticmachine]

Pinging @elastic/security-external-integrations (Team:Security-External Integrations)

[taylor-swanson]

LGTM

[elasticmachine]

Package azure_frontdoor - 1.3.2 containing this change is available at https://epr.elastic.co/search?package=azure_frontdoor

[elasticmachine]

Package carbonblack_edr - 1.14.1 containing this change is available at https://epr.elastic.co/search?package=carbonblack_edr

[elasticmachine]

Package cisco_meraki - 1.15.1 containing this change is available at https://epr.elastic.co/search?package=cisco_meraki

[elasticmachine]

Package juniper_srx - 1.16.1 containing this change is available at https://epr.elastic.co/search?package=juniper_srx

[elasticmachine]

Package netflow - 2.15.1 containing this change is available at https://epr.elastic.co/search?package=netflow