remove azure specific notes in the SAML docs

[despairblue]

This is not necessary anymore once n8n-io/n8n#11724 is merged and released.

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[github-actions]

Overall readability score: 44.24 (🟢 +0)

File	Readability
setup.md	70.33 (🟢 +1.43)

View detailed metrics

🟢 - Shows an increase in readability
🔴 - Shows a decrease in readability

File	Readability	FRE	GF	ARI	CLI	DCRS
setup.md	70.33	51.44	8.76	9	10.07	7.02
	🟢 +1.43	🟢 +0	🟢 +0.17	🟢 +0.3	🟢 +0.52	🔴 -0.01

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	44.24	35.23	11.43	14.7	14.29	8.45
	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0	🟢 +0

View metric targets

Metric	Range	Ideal score
Flesch Reading Ease	100 (very easy read) to 0 (extremely difficult read)	60
Gunning Fog	6 (very easy read) to 17 (extremely difficult read)	8 or less
Auto. Read. Index	6 (very easy read) to 14 (extremely difficult read)	8 or less
Coleman Liau Index	6 (very easy read) to 17 (extremely difficult read)	8 or less
Dale-Chall Readability	4.9 (very easy read) to 9.9 (extremely difficult read)	6.9 or less